Home / 21,732.36-29,990.16-12,777.90

Finding the Fourth Proportional to 21,732.36, 29,990.16 and 12,777.90

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Solution

The fourth proportional to 21,732.36, 29,990.16 and 12,777.90 is: 17,633.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,732.36 : 29,990.16 = 12,777.90 : x
  2. Step 2: Convert to fraction form
    21,732.36/29,990.16 = 12,777.90/x
  3. Step 3: Cross multiply
    21,732.36x = 29,990.16 × 12,777.90
  4. Step 4: Simplify right side
    21,732.36x = 383,211,265.46
  5. Step 5: Solve for x
    x = 383,211,265.46/21,732.36
  6. Step 6: Final answer
    x = 17,633.21

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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.