Home / 42,515.88-63,779.76-18,821.58

Finding the Fourth Proportional to 42,515.88, 63,779.76 and 18,821.58

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Solution

The fourth proportional to 42,515.88, 63,779.76 and 18,821.58 is: 28,235.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,515.88 : 63,779.76 = 18,821.58 : x
  2. Step 2: Convert to fraction form
    42,515.88/63,779.76 = 18,821.58/x
  3. Step 3: Cross multiply
    42,515.88x = 63,779.76 × 18,821.58
  4. Step 4: Simplify right side
    42,515.88x = 1,200,435,855.22
  5. Step 5: Solve for x
    x = 1,200,435,855.22/42,515.88
  6. Step 6: Final answer
    x = 28,235.00

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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.