Home / 21,191.12-29,246.40-12,693.20

Finding the Fourth Proportional to 21,191.12, 29,246.40 and 12,693.20

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Solution

The fourth proportional to 21,191.12, 29,246.40 and 12,693.20 is: 17,518.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.12 : 29,246.40 = 12,693.20 : x
  2. Step 2: Convert to fraction form
    21,191.12/29,246.40 = 12,693.20/x
  3. Step 3: Cross multiply
    21,191.12x = 29,246.40 × 12,693.20
  4. Step 4: Simplify right side
    21,191.12x = 371,230,404.48
  5. Step 5: Solve for x
    x = 371,230,404.48/21,191.12
  6. Step 6: Final answer
    x = 17,518.21

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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.