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Finding the Fourth Proportional to 28,641.59, 42,911.54 and 11,964.92

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Solution

The fourth proportional to 28,641.59, 42,911.54 and 11,964.92 is: 17,926.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,641.59 : 42,911.54 = 11,964.92 : x
  2. Step 2: Convert to fraction form
    28,641.59/42,911.54 = 11,964.92/x
  3. Step 3: Cross multiply
    28,641.59x = 42,911.54 × 11,964.92
  4. Step 4: Simplify right side
    28,641.59x = 513,432,868.79
  5. Step 5: Solve for x
    x = 513,432,868.79/28,641.59
  6. Step 6: Final answer
    x = 17,926.13

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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.