Home / 10,981.87-16,472.81-5,142.58

Finding the Fourth Proportional to 10,981.87, 16,472.81 and 5,142.58

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Solution

The fourth proportional to 10,981.87, 16,472.81 and 5,142.58 is: 7,713.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.87 : 16,472.81 = 5,142.58 : x
  2. Step 2: Convert to fraction form
    10,981.87/16,472.81 = 5,142.58/x
  3. Step 3: Cross multiply
    10,981.87x = 16,472.81 × 5,142.58
  4. Step 4: Simplify right side
    10,981.87x = 84,712,714.92
  5. Step 5: Solve for x
    x = 84,712,714.92/10,981.87
  6. Step 6: Final answer
    x = 7,713.87

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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.