Home / 21,276.60-31,915.68-10,876.20

Finding the Fourth Proportional to 21,276.60, 31,915.68 and 10,876.20

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Solution

The fourth proportional to 21,276.60, 31,915.68 and 10,876.20 is: 16,314.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.60 : 31,915.68 = 10,876.20 : x
  2. Step 2: Convert to fraction form
    21,276.60/31,915.68 = 10,876.20/x
  3. Step 3: Cross multiply
    21,276.60x = 31,915.68 × 10,876.20
  4. Step 4: Simplify right side
    21,276.60x = 347,121,318.82
  5. Step 5: Solve for x
    x = 347,121,318.82/21,276.60
  6. Step 6: Final answer
    x = 16,314.70

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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.