Home / 19,981.28-29,985.30-8,294.50

Finding the Fourth Proportional to 19,981.28, 29,985.30 and 8,294.50

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Solution

The fourth proportional to 19,981.28, 29,985.30 and 8,294.50 is: 12,447.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.28 : 29,985.30 = 8,294.50 : x
  2. Step 2: Convert to fraction form
    19,981.28/29,985.30 = 8,294.50/x
  3. Step 3: Cross multiply
    19,981.28x = 29,985.30 × 8,294.50
  4. Step 4: Simplify right side
    19,981.28x = 248,713,070.85
  5. Step 5: Solve for x
    x = 248,713,070.85/19,981.28
  6. Step 6: Final answer
    x = 12,447.30

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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.