Home / 31,801.80-47,726.40-12,118.80

Finding the Fourth Proportional to 31,801.80, 47,726.40 and 12,118.80

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Solution

The fourth proportional to 31,801.80, 47,726.40 and 12,118.80 is: 18,187.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,801.80 : 47,726.40 = 12,118.80 : x
  2. Step 2: Convert to fraction form
    31,801.80/47,726.40 = 12,118.80/x
  3. Step 3: Cross multiply
    31,801.80x = 47,726.40 × 12,118.80
  4. Step 4: Simplify right side
    31,801.80x = 578,386,696.32
  5. Step 5: Solve for x
    x = 578,386,696.32/31,801.80
  6. Step 6: Final answer
    x = 18,187.23

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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.