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Finding the Fourth Proportional to 15,775.68, 21,770.44 and 8,702.12

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Solution

The fourth proportional to 15,775.68, 21,770.44 and 8,702.12 is: 12,008.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.68 : 21,770.44 = 8,702.12 : x
  2. Step 2: Convert to fraction form
    15,775.68/21,770.44 = 8,702.12/x
  3. Step 3: Cross multiply
    15,775.68x = 21,770.44 × 8,702.12
  4. Step 4: Simplify right side
    15,775.68x = 189,448,981.33
  5. Step 5: Solve for x
    x = 189,448,981.33/15,775.68
  6. Step 6: Final answer
    x = 12,008.93

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Double scale
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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.