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Finding the Fourth Proportional to 28,632.30, 42,951.39 and 9,912.30

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Solution

The fourth proportional to 28,632.30, 42,951.39 and 9,912.30 is: 14,869.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,632.30 : 42,951.39 = 9,912.30 : x
  2. Step 2: Convert to fraction form
    28,632.30/42,951.39 = 9,912.30/x
  3. Step 3: Cross multiply
    28,632.30x = 42,951.39 × 9,912.30
  4. Step 4: Simplify right side
    28,632.30x = 425,746,848.34
  5. Step 5: Solve for x
    x = 425,746,848.34/28,632.30
  6. Step 6: Final answer
    x = 14,869.46

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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.