Home / 14,007.78-19,331.42-7,720.16

Finding the Fourth Proportional to 14,007.78, 19,331.42 and 7,720.16

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Solution

The fourth proportional to 14,007.78, 19,331.42 and 7,720.16 is: 10,654.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,007.78 : 19,331.42 = 7,720.16 : x
  2. Step 2: Convert to fraction form
    14,007.78/19,331.42 = 7,720.16/x
  3. Step 3: Cross multiply
    14,007.78x = 19,331.42 × 7,720.16
  4. Step 4: Simplify right side
    14,007.78x = 149,241,520.17
  5. Step 5: Solve for x
    x = 149,241,520.17/14,007.78
  6. Step 6: Final answer
    x = 10,654.19

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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.