Home / 38,421.60-57,632.40-31,423.20

Finding the Fourth Proportional to 38,421.60, 57,632.40 and 31,423.20

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Solution

The fourth proportional to 38,421.60, 57,632.40 and 31,423.20 is: 47,134.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,421.60 : 57,632.40 = 31,423.20 : x
  2. Step 2: Convert to fraction form
    38,421.60/57,632.40 = 31,423.20/x
  3. Step 3: Cross multiply
    38,421.60x = 57,632.40 × 31,423.20
  4. Step 4: Simplify right side
    38,421.60x = 1,810,994,431.68
  5. Step 5: Solve for x
    x = 1,810,994,431.68/38,421.60
  6. Step 6: Final answer
    x = 47,134.80

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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.