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Finding the Fourth Proportional to 14,007.63, 19,330.93 and 7,720.41

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Solution

The fourth proportional to 14,007.63, 19,330.93 and 7,720.41 is: 10,654.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,007.63 : 19,330.93 = 7,720.41 : x
  2. Step 2: Convert to fraction form
    14,007.63/19,330.93 = 7,720.41/x
  3. Step 3: Cross multiply
    14,007.63x = 19,330.93 × 7,720.41
  4. Step 4: Simplify right side
    14,007.63x = 149,242,705.28
  5. Step 5: Solve for x
    x = 149,242,705.28/14,007.63
  6. Step 6: Final answer
    x = 10,654.39

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.