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Finding the Fourth Proportional to 14,008.08, 19,332 and 7,720.40

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Solution

The fourth proportional to 14,008.08, 19,332 and 7,720.40 is: 10,654.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,008.08 : 19,332 = 7,720.40 : x
  2. Step 2: Convert to fraction form
    14,008.08/19,332 = 7,720.40/x
  3. Step 3: Cross multiply
    14,008.08x = 19,332 × 7,720.40
  4. Step 4: Simplify right side
    14,008.08x = 149,250,772.80
  5. Step 5: Solve for x
    x = 149,250,772.80/14,008.08
  6. Step 6: Final answer
    x = 10,654.62

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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.