Home / 20,339.62-28,065.34-12,780.60

Finding the Fourth Proportional to 20,339.62, 28,065.34 and 12,780.60

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Solution

The fourth proportional to 20,339.62, 28,065.34 and 12,780.60 is: 17,635.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.62 : 28,065.34 = 12,780.60 : x
  2. Step 2: Convert to fraction form
    20,339.62/28,065.34 = 12,780.60/x
  3. Step 3: Cross multiply
    20,339.62x = 28,065.34 × 12,780.60
  4. Step 4: Simplify right side
    20,339.62x = 358,691,852.45
  5. Step 5: Solve for x
    x = 358,691,852.45/20,339.62
  6. Step 6: Final answer
    x = 17,635.13

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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.