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Finding the Fourth Proportional to 28,981.97, 43,479.20 and 8,991.06

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Solution

The fourth proportional to 28,981.97, 43,479.20 and 8,991.06 is: 13,488.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,981.97 : 43,479.20 = 8,991.06 : x
  2. Step 2: Convert to fraction form
    28,981.97/43,479.20 = 8,991.06/x
  3. Step 3: Cross multiply
    28,981.97x = 43,479.20 × 8,991.06
  4. Step 4: Simplify right side
    28,981.97x = 390,924,095.95
  5. Step 5: Solve for x
    x = 390,924,095.95/28,981.97
  6. Step 6: Final answer
    x = 13,488.53

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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.