Home / 20,333.10-28,053.28-11,379.18

Finding the Fourth Proportional to 20,333.10, 28,053.28 and 11,379.18

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Solution

The fourth proportional to 20,333.10, 28,053.28 and 11,379.18 is: 15,699.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,333.10 : 28,053.28 = 11,379.18 : x
  2. Step 2: Convert to fraction form
    20,333.10/28,053.28 = 11,379.18/x
  3. Step 3: Cross multiply
    20,333.10x = 28,053.28 × 11,379.18
  4. Step 4: Simplify right side
    20,333.10x = 319,223,125.55
  5. Step 5: Solve for x
    x = 319,223,125.55/20,333.10
  6. Step 6: Final answer
    x = 15,699.68

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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.