Home / 10,215.78-15,324.55-2,820.24

Finding the Fourth Proportional to 10,215.78, 15,324.55 and 2,820.24

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Solution

The fourth proportional to 10,215.78, 15,324.55 and 2,820.24 is: 4,230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.78 : 15,324.55 = 2,820.24 : x
  2. Step 2: Convert to fraction form
    10,215.78/15,324.55 = 2,820.24/x
  3. Step 3: Cross multiply
    10,215.78x = 15,324.55 × 2,820.24
  4. Step 4: Simplify right side
    10,215.78x = 43,218,925.52
  5. Step 5: Solve for x
    x = 43,218,925.52/10,215.78
  6. Step 6: Final answer
    x = 4,230.60

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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.