Home / 20,883.60-31,301.10-8,397.45

Finding the Fourth Proportional to 20,883.60, 31,301.10 and 8,397.45

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Solution

The fourth proportional to 20,883.60, 31,301.10 and 8,397.45 is: 12,586.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.60 : 31,301.10 = 8,397.45 : x
  2. Step 2: Convert to fraction form
    20,883.60/31,301.10 = 8,397.45/x
  3. Step 3: Cross multiply
    20,883.60x = 31,301.10 × 8,397.45
  4. Step 4: Simplify right side
    20,883.60x = 262,849,422.20
  5. Step 5: Solve for x
    x = 262,849,422.20/20,883.60
  6. Step 6: Final answer
    x = 12,586.40

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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.