Home / 10,765.20-16,142.40-4,915.20

Finding the Fourth Proportional to 10,765.20, 16,142.40 and 4,915.20

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Solution

The fourth proportional to 10,765.20, 16,142.40 and 4,915.20 is: 7,370.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,765.20 : 16,142.40 = 4,915.20 : x
  2. Step 2: Convert to fraction form
    10,765.20/16,142.40 = 4,915.20/x
  3. Step 3: Cross multiply
    10,765.20x = 16,142.40 × 4,915.20
  4. Step 4: Simplify right side
    10,765.20x = 79,343,124.48
  5. Step 5: Solve for x
    x = 79,343,124.48/10,765.20
  6. Step 6: Final answer
    x = 7,370.33

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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.