Home / 20,339.56-28,065.65-11,385.42

Finding the Fourth Proportional to 20,339.56, 28,065.65 and 11,385.42

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Solution

The fourth proportional to 20,339.56, 28,065.65 and 11,385.42 is: 15,710.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.56 : 28,065.65 = 11,385.42 : x
  2. Step 2: Convert to fraction form
    20,339.56/28,065.65 = 11,385.42/x
  3. Step 3: Cross multiply
    20,339.56x = 28,065.65 × 11,385.42
  4. Step 4: Simplify right side
    20,339.56x = 319,539,212.82
  5. Step 5: Solve for x
    x = 319,539,212.82/20,339.56
  6. Step 6: Final answer
    x = 15,710.23

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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.