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Finding the Fourth Proportional to 21,301.80, 31,952.70 and 8,820.12

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Solution

The fourth proportional to 21,301.80, 31,952.70 and 8,820.12 is: 13,230.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,301.80 : 31,952.70 = 8,820.12 : x
  2. Step 2: Convert to fraction form
    21,301.80/31,952.70 = 8,820.12/x
  3. Step 3: Cross multiply
    21,301.80x = 31,952.70 × 8,820.12
  4. Step 4: Simplify right side
    21,301.80x = 281,826,648.32
  5. Step 5: Solve for x
    x = 281,826,648.32/21,301.80
  6. Step 6: Final answer
    x = 13,230.18

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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.