Home / 12,792.68-17,655.20-7,128.35

Finding the Fourth Proportional to 12,792.68, 17,655.20 and 7,128.35

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Solution

The fourth proportional to 12,792.68, 17,655.20 and 7,128.35 is: 9,837.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,792.68 : 17,655.20 = 7,128.35 : x
  2. Step 2: Convert to fraction form
    12,792.68/17,655.20 = 7,128.35/x
  3. Step 3: Cross multiply
    12,792.68x = 17,655.20 × 7,128.35
  4. Step 4: Simplify right side
    12,792.68x = 125,852,543.32
  5. Step 5: Solve for x
    x = 125,852,543.32/12,792.68
  6. Step 6: Final answer
    x = 9,837.85

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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.