Home / 47,915.28-71,865.36-12,857.76

Finding the Fourth Proportional to 47,915.28, 71,865.36 and 12,857.76

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Solution

The fourth proportional to 47,915.28, 71,865.36 and 12,857.76 is: 19,284.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,915.28 : 71,865.36 = 12,857.76 : x
  2. Step 2: Convert to fraction form
    47,915.28/71,865.36 = 12,857.76/x
  3. Step 3: Cross multiply
    47,915.28x = 71,865.36 × 12,857.76
  4. Step 4: Simplify right side
    47,915.28x = 924,027,551.19
  5. Step 5: Solve for x
    x = 924,027,551.19/47,915.28
  6. Step 6: Final answer
    x = 19,284.61

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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.