Home / 20,373.60-30,556.56-9,978.72

Finding the Fourth Proportional to 20,373.60, 30,556.56 and 9,978.72

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Solution

The fourth proportional to 20,373.60, 30,556.56 and 9,978.72 is: 14,966.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.60 : 30,556.56 = 9,978.72 : x
  2. Step 2: Convert to fraction form
    20,373.60/30,556.56 = 9,978.72/x
  3. Step 3: Cross multiply
    20,373.60x = 30,556.56 × 9,978.72
  4. Step 4: Simplify right side
    20,373.60x = 304,915,356.40
  5. Step 5: Solve for x
    x = 304,915,356.40/20,373.60
  6. Step 6: Final answer
    x = 14,966.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.