Home / 12,720.26-17,552.28-7,342.88

Finding the Fourth Proportional to 12,720.26, 17,552.28 and 7,342.88

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Solution

The fourth proportional to 12,720.26, 17,552.28 and 7,342.88 is: 10,132.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.26 : 17,552.28 = 7,342.88 : x
  2. Step 2: Convert to fraction form
    12,720.26/17,552.28 = 7,342.88/x
  3. Step 3: Cross multiply
    12,720.26x = 17,552.28 × 7,342.88
  4. Step 4: Simplify right side
    12,720.26x = 128,884,285.77
  5. Step 5: Solve for x
    x = 128,884,285.77/12,720.26
  6. Step 6: Final answer
    x = 10,132.21

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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.