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Finding the Fourth Proportional to 10,689.70, 16,034.55 and 6,811.30

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Solution

The fourth proportional to 10,689.70, 16,034.55 and 6,811.30 is: 10,216.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,689.70 : 16,034.55 = 6,811.30 : x
  2. Step 2: Convert to fraction form
    10,689.70/16,034.55 = 6,811.30/x
  3. Step 3: Cross multiply
    10,689.70x = 16,034.55 × 6,811.30
  4. Step 4: Simplify right side
    10,689.70x = 109,216,130.42
  5. Step 5: Solve for x
    x = 109,216,130.42/10,689.70
  6. Step 6: Final answer
    x = 10,216.95

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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.