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Finding the Fourth Proportional to 21,951.91, 32,931.06 and 7,157.17

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Solution

The fourth proportional to 21,951.91, 32,931.06 and 7,157.17 is: 10,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.91 : 32,931.06 = 7,157.17 : x
  2. Step 2: Convert to fraction form
    21,951.91/32,931.06 = 7,157.17/x
  3. Step 3: Cross multiply
    21,951.91x = 32,931.06 × 7,157.17
  4. Step 4: Simplify right side
    21,951.91x = 235,693,194.70
  5. Step 5: Solve for x
    x = 235,693,194.70/21,951.91
  6. Step 6: Final answer
    x = 10,736.80

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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.