Home / 28,618.80-42,937.20-13,828.20

Finding the Fourth Proportional to 28,618.80, 42,937.20 and 13,828.20

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Solution

The fourth proportional to 28,618.80, 42,937.20 and 13,828.20 is: 20,746.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.80 : 42,937.20 = 13,828.20 : x
  2. Step 2: Convert to fraction form
    28,618.80/42,937.20 = 13,828.20/x
  3. Step 3: Cross multiply
    28,618.80x = 42,937.20 × 13,828.20
  4. Step 4: Simplify right side
    28,618.80x = 593,744,189.04
  5. Step 5: Solve for x
    x = 593,744,189.04/28,618.80
  6. Step 6: Final answer
    x = 20,746.65

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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.