Home / 31,615.76-43,632.04-18,191.20

Finding the Fourth Proportional to 31,615.76, 43,632.04 and 18,191.20

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Solution

The fourth proportional to 31,615.76, 43,632.04 and 18,191.20 is: 25,105.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,615.76 : 43,632.04 = 18,191.20 : x
  2. Step 2: Convert to fraction form
    31,615.76/43,632.04 = 18,191.20/x
  3. Step 3: Cross multiply
    31,615.76x = 43,632.04 × 18,191.20
  4. Step 4: Simplify right side
    31,615.76x = 793,719,166.05
  5. Step 5: Solve for x
    x = 793,719,166.05/31,615.76
  6. Step 6: Final answer
    x = 25,105.17

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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.