Home / 9,420.18-12,967.22-8,143.47

Finding the Fourth Proportional to 9,420.18, 12,967.22 and 8,143.47

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Solution

The fourth proportional to 9,420.18, 12,967.22 and 8,143.47 is: 11,209.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.18 : 12,967.22 = 8,143.47 : x
  2. Step 2: Convert to fraction form
    9,420.18/12,967.22 = 8,143.47/x
  3. Step 3: Cross multiply
    9,420.18x = 12,967.22 × 8,143.47
  4. Step 4: Simplify right side
    9,420.18x = 105,598,167.05
  5. Step 5: Solve for x
    x = 105,598,167.05/9,420.18
  6. Step 6: Final answer
    x = 11,209.78

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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.