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Finding the Fourth Proportional to 28,642.92, 42,947.02 and 12,844.99

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Solution

The fourth proportional to 28,642.92, 42,947.02 and 12,844.99 is: 19,259.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,642.92 : 42,947.02 = 12,844.99 : x
  2. Step 2: Convert to fraction form
    28,642.92/42,947.02 = 12,844.99/x
  3. Step 3: Cross multiply
    28,642.92x = 42,947.02 × 12,844.99
  4. Step 4: Simplify right side
    28,642.92x = 551,654,042.43
  5. Step 5: Solve for x
    x = 551,654,042.43/28,642.92
  6. Step 6: Final answer
    x = 19,259.70

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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.