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Finding the Fourth Proportional to 18,353.12, 27,513.36 and 7,959.20

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Solution

The fourth proportional to 18,353.12, 27,513.36 and 7,959.20 is: 11,931.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,353.12 : 27,513.36 = 7,959.20 : x
  2. Step 2: Convert to fraction form
    18,353.12/27,513.36 = 7,959.20/x
  3. Step 3: Cross multiply
    18,353.12x = 27,513.36 × 7,959.20
  4. Step 4: Simplify right side
    18,353.12x = 218,984,334.91
  5. Step 5: Solve for x
    x = 218,984,334.91/18,353.12
  6. Step 6: Final answer
    x = 11,931.72

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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.