Home / 21,309.18-29,400.14-12,354.89

Finding the Fourth Proportional to 21,309.18, 29,400.14 and 12,354.89

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Solution

The fourth proportional to 21,309.18, 29,400.14 and 12,354.89 is: 17,045.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.18 : 29,400.14 = 12,354.89 : x
  2. Step 2: Convert to fraction form
    21,309.18/29,400.14 = 12,354.89/x
  3. Step 3: Cross multiply
    21,309.18x = 29,400.14 × 12,354.89
  4. Step 4: Simplify right side
    21,309.18x = 363,235,379.57
  5. Step 5: Solve for x
    x = 363,235,379.57/21,309.18
  6. Step 6: Final answer
    x = 17,045.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.