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Finding the Fourth Proportional to 28,604.70, 42,911.10 and 8,881.20

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Solution

The fourth proportional to 28,604.70, 42,911.10 and 8,881.20 is: 13,323.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,604.70 : 42,911.10 = 8,881.20 : x
  2. Step 2: Convert to fraction form
    28,604.70/42,911.10 = 8,881.20/x
  3. Step 3: Cross multiply
    28,604.70x = 42,911.10 × 8,881.20
  4. Step 4: Simplify right side
    28,604.70x = 381,102,061.32
  5. Step 5: Solve for x
    x = 381,102,061.32/28,604.70
  6. Step 6: Final answer
    x = 13,323.06

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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.