Home / 20,704.17-28,587.87-15,916.70

Finding the Fourth Proportional to 20,704.17, 28,587.87 and 15,916.70

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Solution

The fourth proportional to 20,704.17, 28,587.87 and 15,916.70 is: 21,977.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.17 : 28,587.87 = 15,916.70 : x
  2. Step 2: Convert to fraction form
    20,704.17/28,587.87 = 15,916.70/x
  3. Step 3: Cross multiply
    20,704.17x = 28,587.87 × 15,916.70
  4. Step 4: Simplify right side
    20,704.17x = 455,024,621.90
  5. Step 5: Solve for x
    x = 455,024,621.90/20,704.17
  6. Step 6: Final answer
    x = 21,977.43

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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.