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Finding the Fourth Proportional to 28,642.60, 39,540.90 and 18,048.52

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Solution

The fourth proportional to 28,642.60, 39,540.90 and 18,048.52 is: 24,915.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,642.60 : 39,540.90 = 18,048.52 : x
  2. Step 2: Convert to fraction form
    28,642.60/39,540.90 = 18,048.52/x
  3. Step 3: Cross multiply
    28,642.60x = 39,540.90 × 18,048.52
  4. Step 4: Simplify right side
    28,642.60x = 713,654,724.47
  5. Step 5: Solve for x
    x = 713,654,724.47/28,642.60
  6. Step 6: Final answer
    x = 24,915.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.