Home / 19,908.20-29,862.30-7,428.20

Finding the Fourth Proportional to 19,908.20, 29,862.30 and 7,428.20

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Solution

The fourth proportional to 19,908.20, 29,862.30 and 7,428.20 is: 11,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,908.20 : 29,862.30 = 7,428.20 : x
  2. Step 2: Convert to fraction form
    19,908.20/29,862.30 = 7,428.20/x
  3. Step 3: Cross multiply
    19,908.20x = 29,862.30 × 7,428.20
  4. Step 4: Simplify right side
    19,908.20x = 221,823,136.86
  5. Step 5: Solve for x
    x = 221,823,136.86/19,908.20
  6. Step 6: Final answer
    x = 11,142.30

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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.