Home / 31,709.16-43,739.52-20,374.92

Finding the Fourth Proportional to 31,709.16, 43,739.52 and 20,374.92

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Solution

The fourth proportional to 31,709.16, 43,739.52 and 20,374.92 is: 28,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,709.16 : 43,739.52 = 20,374.92 : x
  2. Step 2: Convert to fraction form
    31,709.16/43,739.52 = 20,374.92/x
  3. Step 3: Cross multiply
    31,709.16x = 43,739.52 × 20,374.92
  4. Step 4: Simplify right side
    31,709.16x = 891,189,220.84
  5. Step 5: Solve for x
    x = 891,189,220.84/31,709.16
  6. Step 6: Final answer
    x = 28,105.10

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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.