Home / 10,120.78-15,181.26-3,547.12

Finding the Fourth Proportional to 10,120.78, 15,181.26 and 3,547.12

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Solution

The fourth proportional to 10,120.78, 15,181.26 and 3,547.12 is: 5,320.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.78 : 15,181.26 = 3,547.12 : x
  2. Step 2: Convert to fraction form
    10,120.78/15,181.26 = 3,547.12/x
  3. Step 3: Cross multiply
    10,120.78x = 15,181.26 × 3,547.12
  4. Step 4: Simplify right side
    10,120.78x = 53,849,750.97
  5. Step 5: Solve for x
    x = 53,849,750.97/10,120.78
  6. Step 6: Final answer
    x = 5,320.71

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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.