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Finding the Fourth Proportional to 28,423.68, 42,637.92 and 7,648.32

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Solution

The fourth proportional to 28,423.68, 42,637.92 and 7,648.32 is: 11,473.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.68 : 42,637.92 = 7,648.32 : x
  2. Step 2: Convert to fraction form
    28,423.68/42,637.92 = 7,648.32/x
  3. Step 3: Cross multiply
    28,423.68x = 42,637.92 × 7,648.32
  4. Step 4: Simplify right side
    28,423.68x = 326,108,456.29
  5. Step 5: Solve for x
    x = 326,108,456.29/28,423.68
  6. Step 6: Final answer
    x = 11,473.13

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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.