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Finding the Fourth Proportional to 8,754.40, 13,133.40 and 2,915.20

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Solution

The fourth proportional to 8,754.40, 13,133.40 and 2,915.20 is: 4,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,754.40 : 13,133.40 = 2,915.20 : x
  2. Step 2: Convert to fraction form
    8,754.40/13,133.40 = 2,915.20/x
  3. Step 3: Cross multiply
    8,754.40x = 13,133.40 × 2,915.20
  4. Step 4: Simplify right side
    8,754.40x = 38,286,487.68
  5. Step 5: Solve for x
    x = 38,286,487.68/8,754.40
  6. Step 6: Final answer
    x = 4,373.40

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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.