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Finding the Fourth Proportional to 20,710.70, 31,070.10 and 8,864.45

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Solution

The fourth proportional to 20,710.70, 31,070.10 and 8,864.45 is: 13,298.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.70 : 31,070.10 = 8,864.45 : x
  2. Step 2: Convert to fraction form
    20,710.70/31,070.10 = 8,864.45/x
  3. Step 3: Cross multiply
    20,710.70x = 31,070.10 × 8,864.45
  4. Step 4: Simplify right side
    20,710.70x = 275,419,347.95
  5. Step 5: Solve for x
    x = 275,419,347.95/20,710.70
  6. Step 6: Final answer
    x = 13,298.41

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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.