Home / 13,581.15-18,742.23-7,612.80

Finding the Fourth Proportional to 13,581.15, 18,742.23 and 7,612.80

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Solution

The fourth proportional to 13,581.15, 18,742.23 and 7,612.80 is: 10,505.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.15 : 18,742.23 = 7,612.80 : x
  2. Step 2: Convert to fraction form
    13,581.15/18,742.23 = 7,612.80/x
  3. Step 3: Cross multiply
    13,581.15x = 18,742.23 × 7,612.80
  4. Step 4: Simplify right side
    13,581.15x = 142,680,848.54
  5. Step 5: Solve for x
    x = 142,680,848.54/13,581.15
  6. Step 6: Final answer
    x = 10,505.80

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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.