Home / 28,436.40-42,593.04-20,628

Finding the Fourth Proportional to 28,436.40, 42,593.04 and 20,628

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Solution

The fourth proportional to 28,436.40, 42,593.04 and 20,628 is: 30,897.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.40 : 42,593.04 = 20,628 : x
  2. Step 2: Convert to fraction form
    28,436.40/42,593.04 = 20,628/x
  3. Step 3: Cross multiply
    28,436.40x = 42,593.04 × 20,628
  4. Step 4: Simplify right side
    28,436.40x = 878,609,229.12
  5. Step 5: Solve for x
    x = 878,609,229.12/28,436.40
  6. Step 6: Final answer
    x = 30,897.34

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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.