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Finding the Fourth Proportional to 28,609.40, 42,915.98 and 9,891.24

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Solution

The fourth proportional to 28,609.40, 42,915.98 and 9,891.24 is: 14,837.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,609.40 : 42,915.98 = 9,891.24 : x
  2. Step 2: Convert to fraction form
    28,609.40/42,915.98 = 9,891.24/x
  3. Step 3: Cross multiply
    28,609.40x = 42,915.98 × 9,891.24
  4. Step 4: Simplify right side
    28,609.40x = 424,492,282.74
  5. Step 5: Solve for x
    x = 424,492,282.74/28,609.40
  6. Step 6: Final answer
    x = 14,837.51

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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.