Home / 20,864.98-31,301.12-11,500.98

Finding the Fourth Proportional to 20,864.98, 31,301.12 and 11,500.98

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Solution

The fourth proportional to 20,864.98, 31,301.12 and 11,500.98 is: 17,253.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.98 : 31,301.12 = 11,500.98 : x
  2. Step 2: Convert to fraction form
    20,864.98/31,301.12 = 11,500.98/x
  3. Step 3: Cross multiply
    20,864.98x = 31,301.12 × 11,500.98
  4. Step 4: Simplify right side
    20,864.98x = 359,993,555.10
  5. Step 5: Solve for x
    x = 359,993,555.10/20,864.98
  6. Step 6: Final answer
    x = 17,253.48

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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.