Home / 12,990.02-17,922.24-7,948.92

Finding the Fourth Proportional to 12,990.02, 17,922.24 and 7,948.92

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Solution

The fourth proportional to 12,990.02, 17,922.24 and 7,948.92 is: 10,967.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.02 : 17,922.24 = 7,948.92 : x
  2. Step 2: Convert to fraction form
    12,990.02/17,922.24 = 7,948.92/x
  3. Step 3: Cross multiply
    12,990.02x = 17,922.24 × 7,948.92
  4. Step 4: Simplify right side
    12,990.02x = 142,462,451.98
  5. Step 5: Solve for x
    x = 142,462,451.98/12,990.02
  6. Step 6: Final answer
    x = 10,967.07

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.