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Finding the Fourth Proportional to 28,479.34, 42,718.92 and 7,702.84

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Solution

The fourth proportional to 28,479.34, 42,718.92 and 7,702.84 is: 11,554.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.34 : 42,718.92 = 7,702.84 : x
  2. Step 2: Convert to fraction form
    28,479.34/42,718.92 = 7,702.84/x
  3. Step 3: Cross multiply
    28,479.34x = 42,718.92 × 7,702.84
  4. Step 4: Simplify right side
    28,479.34x = 329,057,005.73
  5. Step 5: Solve for x
    x = 329,057,005.73/28,479.34
  6. Step 6: Final answer
    x = 11,554.24

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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.