Home / 42,515.40-63,779-18,821.08

Finding the Fourth Proportional to 42,515.40, 63,779 and 18,821.08

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Solution

The fourth proportional to 42,515.40, 63,779 and 18,821.08 is: 28,234.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,515.40 : 63,779 = 18,821.08 : x
  2. Step 2: Convert to fraction form
    42,515.40/63,779 = 18,821.08/x
  3. Step 3: Cross multiply
    42,515.40x = 63,779 × 18,821.08
  4. Step 4: Simplify right side
    42,515.40x = 1,200,389,661.32
  5. Step 5: Solve for x
    x = 1,200,389,661.32/42,515.40
  6. Step 6: Final answer
    x = 28,234.23

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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.