Home / 31,086.24-42,905.64-20,476.80

Finding the Fourth Proportional to 31,086.24, 42,905.64 and 20,476.80

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Solution

The fourth proportional to 31,086.24, 42,905.64 and 20,476.80 is: 28,262.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,086.24 : 42,905.64 = 20,476.80 : x
  2. Step 2: Convert to fraction form
    31,086.24/42,905.64 = 20,476.80/x
  3. Step 3: Cross multiply
    31,086.24x = 42,905.64 × 20,476.80
  4. Step 4: Simplify right side
    31,086.24x = 878,570,209.15
  5. Step 5: Solve for x
    x = 878,570,209.15/31,086.24
  6. Step 6: Final answer
    x = 28,262.35

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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.