Home / 10,151.80-15,215.55-5,218.90

Finding the Fourth Proportional to 10,151.80, 15,215.55 and 5,218.90

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Solution

The fourth proportional to 10,151.80, 15,215.55 and 5,218.90 is: 7,822.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,151.80 : 15,215.55 = 5,218.90 : x
  2. Step 2: Convert to fraction form
    10,151.80/15,215.55 = 5,218.90/x
  3. Step 3: Cross multiply
    10,151.80x = 15,215.55 × 5,218.90
  4. Step 4: Simplify right side
    10,151.80x = 79,408,433.90
  5. Step 5: Solve for x
    x = 79,408,433.90/10,151.80
  6. Step 6: Final answer
    x = 7,822.10

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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.