Home / 42,708.60-64,069.56-20,517.84

Finding the Fourth Proportional to 42,708.60, 64,069.56 and 20,517.84

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Solution

The fourth proportional to 42,708.60, 64,069.56 and 20,517.84 is: 30,779.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,708.60 : 64,069.56 = 20,517.84 : x
  2. Step 2: Convert to fraction form
    42,708.60/64,069.56 = 20,517.84/x
  3. Step 3: Cross multiply
    42,708.60x = 64,069.56 × 20,517.84
  4. Step 4: Simplify right side
    42,708.60x = 1,314,568,980.95
  5. Step 5: Solve for x
    x = 1,314,568,980.95/42,708.60
  6. Step 6: Final answer
    x = 30,779.96

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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.