Home / 20,688.62-28,523.61-15,031.58

Finding the Fourth Proportional to 20,688.62, 28,523.61 and 15,031.58

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Solution

The fourth proportional to 20,688.62, 28,523.61 and 15,031.58 is: 20,724.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.62 : 28,523.61 = 15,031.58 : x
  2. Step 2: Convert to fraction form
    20,688.62/28,523.61 = 15,031.58/x
  3. Step 3: Cross multiply
    20,688.62x = 28,523.61 × 15,031.58
  4. Step 4: Simplify right side
    20,688.62x = 428,754,925.60
  5. Step 5: Solve for x
    x = 428,754,925.60/20,688.62
  6. Step 6: Final answer
    x = 20,724.19

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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.