Home / 12,240.72-18,335.16-10,155.78

Finding the Fourth Proportional to 12,240.72, 18,335.16 and 10,155.78

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Solution

The fourth proportional to 12,240.72, 18,335.16 and 10,155.78 is: 15,212.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,240.72 : 18,335.16 = 10,155.78 : x
  2. Step 2: Convert to fraction form
    12,240.72/18,335.16 = 10,155.78/x
  3. Step 3: Cross multiply
    12,240.72x = 18,335.16 × 10,155.78
  4. Step 4: Simplify right side
    12,240.72x = 186,207,851.22
  5. Step 5: Solve for x
    x = 186,207,851.22/12,240.72
  6. Step 6: Final answer
    x = 15,212.16

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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.