Home / 10,515.20-15,770.12-3,117.93

Finding the Fourth Proportional to 10,515.20, 15,770.12 and 3,117.93

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Solution

The fourth proportional to 10,515.20, 15,770.12 and 3,117.93 is: 4,676.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.20 : 15,770.12 = 3,117.93 : x
  2. Step 2: Convert to fraction form
    10,515.20/15,770.12 = 3,117.93/x
  3. Step 3: Cross multiply
    10,515.20x = 15,770.12 × 3,117.93
  4. Step 4: Simplify right side
    10,515.20x = 49,170,130.25
  5. Step 5: Solve for x
    x = 49,170,130.25/10,515.20
  6. Step 6: Final answer
    x = 4,676.10

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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.