Home / 31,870.28-47,789.10-18,726.60

Finding the Fourth Proportional to 31,870.28, 47,789.10 and 18,726.60

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Solution

The fourth proportional to 31,870.28, 47,789.10 and 18,726.60 is: 28,080.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,870.28 : 47,789.10 = 18,726.60 : x
  2. Step 2: Convert to fraction form
    31,870.28/47,789.10 = 18,726.60/x
  3. Step 3: Cross multiply
    31,870.28x = 47,789.10 × 18,726.60
  4. Step 4: Simplify right side
    31,870.28x = 894,927,360.06
  5. Step 5: Solve for x
    x = 894,927,360.06/31,870.28
  6. Step 6: Final answer
    x = 28,080.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.