Home / 20,339.66-28,065.78-11,385.51

Finding the Fourth Proportional to 20,339.66, 28,065.78 and 11,385.51

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Solution

The fourth proportional to 20,339.66, 28,065.78 and 11,385.51 is: 15,710.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.66 : 28,065.78 = 11,385.51 : x
  2. Step 2: Convert to fraction form
    20,339.66/28,065.78 = 11,385.51/x
  3. Step 3: Cross multiply
    20,339.66x = 28,065.78 × 11,385.51
  4. Step 4: Simplify right side
    20,339.66x = 319,543,218.85
  5. Step 5: Solve for x
    x = 319,543,218.85/20,339.66
  6. Step 6: Final answer
    x = 15,710.35

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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.