Home / 10,981.80-16,463.10-9,815.40

Finding the Fourth Proportional to 10,981.80, 16,463.10 and 9,815.40

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Solution

The fourth proportional to 10,981.80, 16,463.10 and 9,815.40 is: 14,714.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.80 : 16,463.10 = 9,815.40 : x
  2. Step 2: Convert to fraction form
    10,981.80/16,463.10 = 9,815.40/x
  3. Step 3: Cross multiply
    10,981.80x = 16,463.10 × 9,815.40
  4. Step 4: Simplify right side
    10,981.80x = 161,591,911.74
  5. Step 5: Solve for x
    x = 161,591,911.74/10,981.80
  6. Step 6: Final answer
    x = 14,714.52

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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.