Home / 28,318.55-39,080.60-15,572.70

Finding the Fourth Proportional to 28,318.55, 39,080.60 and 15,572.70

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Solution

The fourth proportional to 28,318.55, 39,080.60 and 15,572.70 is: 21,490.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.55 : 39,080.60 = 15,572.70 : x
  2. Step 2: Convert to fraction form
    28,318.55/39,080.60 = 15,572.70/x
  3. Step 3: Cross multiply
    28,318.55x = 39,080.60 × 15,572.70
  4. Step 4: Simplify right side
    28,318.55x = 608,590,459.62
  5. Step 5: Solve for x
    x = 608,590,459.62/28,318.55
  6. Step 6: Final answer
    x = 21,490.88

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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.