Home / 20,775.60-31,147.20-11,541.60

Finding the Fourth Proportional to 20,775.60, 31,147.20 and 11,541.60

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Solution

The fourth proportional to 20,775.60, 31,147.20 and 11,541.60 is: 17,303.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.60 : 31,147.20 = 11,541.60 : x
  2. Step 2: Convert to fraction form
    20,775.60/31,147.20 = 11,541.60/x
  3. Step 3: Cross multiply
    20,775.60x = 31,147.20 × 11,541.60
  4. Step 4: Simplify right side
    20,775.60x = 359,488,523.52
  5. Step 5: Solve for x
    x = 359,488,523.52/20,775.60
  6. Step 6: Final answer
    x = 17,303.40

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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.