Home / 28,720.80-43,032.60-13,897.80

Finding the Fourth Proportional to 28,720.80, 43,032.60 and 13,897.80

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Solution

The fourth proportional to 28,720.80, 43,032.60 and 13,897.80 is: 20,823.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.80 : 43,032.60 = 13,897.80 : x
  2. Step 2: Convert to fraction form
    28,720.80/43,032.60 = 13,897.80/x
  3. Step 3: Cross multiply
    28,720.80x = 43,032.60 × 13,897.80
  4. Step 4: Simplify right side
    28,720.80x = 598,058,468.28
  5. Step 5: Solve for x
    x = 598,058,468.28/28,720.80
  6. Step 6: Final answer
    x = 20,823.18

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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.