Home / 21,420.20-32,116.80-8,948.90

Finding the Fourth Proportional to 21,420.20, 32,116.80 and 8,948.90

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Solution

The fourth proportional to 21,420.20, 32,116.80 and 8,948.90 is: 13,417.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.20 : 32,116.80 = 8,948.90 : x
  2. Step 2: Convert to fraction form
    21,420.20/32,116.80 = 8,948.90/x
  3. Step 3: Cross multiply
    21,420.20x = 32,116.80 × 8,948.90
  4. Step 4: Simplify right side
    21,420.20x = 287,410,031.52
  5. Step 5: Solve for x
    x = 287,410,031.52/21,420.20
  6. Step 6: Final answer
    x = 13,417.71

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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.