Home / 28,621.90-42,919.52-16,779.30

Finding the Fourth Proportional to 28,621.90, 42,919.52 and 16,779.30

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Solution

The fourth proportional to 28,621.90, 42,919.52 and 16,779.30 is: 25,161.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,621.90 : 42,919.52 = 16,779.30 : x
  2. Step 2: Convert to fraction form
    28,621.90/42,919.52 = 16,779.30/x
  3. Step 3: Cross multiply
    28,621.90x = 42,919.52 × 16,779.30
  4. Step 4: Simplify right side
    28,621.90x = 720,159,351.47
  5. Step 5: Solve for x
    x = 720,159,351.47/28,621.90
  6. Step 6: Final answer
    x = 25,161.13

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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.