Home / 21,513.46-29,680.28-15,861.64

Finding the Fourth Proportional to 21,513.46, 29,680.28 and 15,861.64

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Solution

The fourth proportional to 21,513.46, 29,680.28 and 15,861.64 is: 21,882.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.46 : 29,680.28 = 15,861.64 : x
  2. Step 2: Convert to fraction form
    21,513.46/29,680.28 = 15,861.64/x
  3. Step 3: Cross multiply
    21,513.46x = 29,680.28 × 15,861.64
  4. Step 4: Simplify right side
    21,513.46x = 470,777,916.46
  5. Step 5: Solve for x
    x = 470,777,916.46/21,513.46
  6. Step 6: Final answer
    x = 21,882.95

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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.