Home / 20,739.20-31,090.08-7,582.40

Finding the Fourth Proportional to 20,739.20, 31,090.08 and 7,582.40

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Solution

The fourth proportional to 20,739.20, 31,090.08 and 7,582.40 is: 11,366.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.20 : 31,090.08 = 7,582.40 : x
  2. Step 2: Convert to fraction form
    20,739.20/31,090.08 = 7,582.40/x
  3. Step 3: Cross multiply
    20,739.20x = 31,090.08 × 7,582.40
  4. Step 4: Simplify right side
    20,739.20x = 235,737,422.59
  5. Step 5: Solve for x
    x = 235,737,422.59/20,739.20
  6. Step 6: Final answer
    x = 11,366.76

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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.