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Finding the Fourth Proportional to 10,765.70, 16,143.15 and 4,915.70

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Solution

The fourth proportional to 10,765.70, 16,143.15 and 4,915.70 is: 7,371.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,765.70 : 16,143.15 = 4,915.70 : x
  2. Step 2: Convert to fraction form
    10,765.70/16,143.15 = 4,915.70/x
  3. Step 3: Cross multiply
    10,765.70x = 16,143.15 × 4,915.70
  4. Step 4: Simplify right side
    10,765.70x = 79,354,882.46
  5. Step 5: Solve for x
    x = 79,354,882.46/10,765.70
  6. Step 6: Final answer
    x = 7,371.08

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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.