Home / 21,170.10-31,766.10-11,312.40

Finding the Fourth Proportional to 21,170.10, 31,766.10 and 11,312.40

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Solution

The fourth proportional to 21,170.10, 31,766.10 and 11,312.40 is: 16,974.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.10 : 31,766.10 = 11,312.40 : x
  2. Step 2: Convert to fraction form
    21,170.10/31,766.10 = 11,312.40/x
  3. Step 3: Cross multiply
    21,170.10x = 31,766.10 × 11,312.40
  4. Step 4: Simplify right side
    21,170.10x = 359,350,829.64
  5. Step 5: Solve for x
    x = 359,350,829.64/21,170.10
  6. Step 6: Final answer
    x = 16,974.45

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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.