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Finding the Fourth Proportional to 15,775.53, 21,770.25 and 8,701.95

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Solution

The fourth proportional to 15,775.53, 21,770.25 and 8,701.95 is: 12,008.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.53 : 21,770.25 = 8,701.95 : x
  2. Step 2: Convert to fraction form
    15,775.53/21,770.25 = 8,701.95/x
  3. Step 3: Cross multiply
    15,775.53x = 21,770.25 × 8,701.95
  4. Step 4: Simplify right side
    15,775.53x = 189,443,626.99
  5. Step 5: Solve for x
    x = 189,443,626.99/15,775.53
  6. Step 6: Final answer
    x = 12,008.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.