Home / 21,985.20-32,929.20-8,830.80

Finding the Fourth Proportional to 21,985.20, 32,929.20 and 8,830.80

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Solution

The fourth proportional to 21,985.20, 32,929.20 and 8,830.80 is: 13,226.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.20 : 32,929.20 = 8,830.80 : x
  2. Step 2: Convert to fraction form
    21,985.20/32,929.20 = 8,830.80/x
  3. Step 3: Cross multiply
    21,985.20x = 32,929.20 × 8,830.80
  4. Step 4: Simplify right side
    21,985.20x = 290,791,179.36
  5. Step 5: Solve for x
    x = 290,791,179.36/21,985.20
  6. Step 6: Final answer
    x = 13,226.68

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1.5x scale

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.