Home / 13,612.51-18,785.20-7,951.15

Finding the Fourth Proportional to 13,612.51, 18,785.20 and 7,951.15

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Solution

The fourth proportional to 13,612.51, 18,785.20 and 7,951.15 is: 10,972.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.51 : 18,785.20 = 7,951.15 : x
  2. Step 2: Convert to fraction form
    13,612.51/18,785.20 = 7,951.15/x
  3. Step 3: Cross multiply
    13,612.51x = 18,785.20 × 7,951.15
  4. Step 4: Simplify right side
    13,612.51x = 149,363,809.30
  5. Step 5: Solve for x
    x = 149,363,809.30/13,612.51
  6. Step 6: Final answer
    x = 10,972.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.