Home / 14,008.20-19,331.20-7,720.56

Finding the Fourth Proportional to 14,008.20, 19,331.20 and 7,720.56

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Solution

The fourth proportional to 14,008.20, 19,331.20 and 7,720.56 is: 10,654.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,008.20 : 19,331.20 = 7,720.56 : x
  2. Step 2: Convert to fraction form
    14,008.20/19,331.20 = 7,720.56/x
  3. Step 3: Cross multiply
    14,008.20x = 19,331.20 × 7,720.56
  4. Step 4: Simplify right side
    14,008.20x = 149,247,689.47
  5. Step 5: Solve for x
    x = 149,247,689.47/14,008.20
  6. Step 6: Final answer
    x = 10,654.31

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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.