Home / 31,451.66-43,384.86-20,117.02

Finding the Fourth Proportional to 31,451.66, 43,384.86 and 20,117.02

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Solution

The fourth proportional to 31,451.66, 43,384.86 and 20,117.02 is: 27,749.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,451.66 : 43,384.86 = 20,117.02 : x
  2. Step 2: Convert to fraction form
    31,451.66/43,384.86 = 20,117.02/x
  3. Step 3: Cross multiply
    31,451.66x = 43,384.86 × 20,117.02
  4. Step 4: Simplify right side
    31,451.66x = 872,773,778.81
  5. Step 5: Solve for x
    x = 872,773,778.81/31,451.66
  6. Step 6: Final answer
    x = 27,749.69

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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.