Home / 31,649.74-43,680.77-18,221.56

Finding the Fourth Proportional to 31,649.74, 43,680.77 and 18,221.56

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Solution

The fourth proportional to 31,649.74, 43,680.77 and 18,221.56 is: 25,148.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,649.74 : 43,680.77 = 18,221.56 : x
  2. Step 2: Convert to fraction form
    31,649.74/43,680.77 = 18,221.56/x
  3. Step 3: Cross multiply
    31,649.74x = 43,680.77 × 18,221.56
  4. Step 4: Simplify right side
    31,649.74x = 795,931,639.42
  5. Step 5: Solve for x
    x = 795,931,639.42/31,649.74
  6. Step 6: Final answer
    x = 25,148.13

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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.