Home / 14,120.12-21,158.31-8,915.06

Finding the Fourth Proportional to 14,120.12, 21,158.31 and 8,915.06

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Solution

The fourth proportional to 14,120.12, 21,158.31 and 8,915.06 is: 13,358.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,120.12 : 21,158.31 = 8,915.06 : x
  2. Step 2: Convert to fraction form
    14,120.12/21,158.31 = 8,915.06/x
  3. Step 3: Cross multiply
    14,120.12x = 21,158.31 × 8,915.06
  4. Step 4: Simplify right side
    14,120.12x = 188,627,689.48
  5. Step 5: Solve for x
    x = 188,627,689.48/14,120.12
  6. Step 6: Final answer
    x = 13,358.79

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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.