Home / 10,981.10-16,471.65-5,138.30

Finding the Fourth Proportional to 10,981.10, 16,471.65 and 5,138.30

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Solution

The fourth proportional to 10,981.10, 16,471.65 and 5,138.30 is: 7,707.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.10 : 16,471.65 = 5,138.30 : x
  2. Step 2: Convert to fraction form
    10,981.10/16,471.65 = 5,138.30/x
  3. Step 3: Cross multiply
    10,981.10x = 16,471.65 × 5,138.30
  4. Step 4: Simplify right side
    10,981.10x = 84,636,279.20
  5. Step 5: Solve for x
    x = 84,636,279.20/10,981.10
  6. Step 6: Final answer
    x = 7,707.45

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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.