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Finding the Fourth Proportional to 28,478.53, 42,717.80 and 8,488.33

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Solution

The fourth proportional to 28,478.53, 42,717.80 and 8,488.33 is: 12,732.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.53 : 42,717.80 = 8,488.33 : x
  2. Step 2: Convert to fraction form
    28,478.53/42,717.80 = 8,488.33/x
  3. Step 3: Cross multiply
    28,478.53x = 42,717.80 × 8,488.33
  4. Step 4: Simplify right side
    28,478.53x = 362,602,783.27
  5. Step 5: Solve for x
    x = 362,602,783.27/28,478.53
  6. Step 6: Final answer
    x = 12,732.50

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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.