Home / 12,721.28-19,082.10-5,787.68

Finding the Fourth Proportional to 12,721.28, 19,082.10 and 5,787.68

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Solution

The fourth proportional to 12,721.28, 19,082.10 and 5,787.68 is: 8,681.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.28 : 19,082.10 = 5,787.68 : x
  2. Step 2: Convert to fraction form
    12,721.28/19,082.10 = 5,787.68/x
  3. Step 3: Cross multiply
    12,721.28x = 19,082.10 × 5,787.68
  4. Step 4: Simplify right side
    12,721.28x = 110,441,088.53
  5. Step 5: Solve for x
    x = 110,441,088.53/12,721.28
  6. Step 6: Final answer
    x = 8,681.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.