Home / 20,780.48-28,677-11,349.04

Finding the Fourth Proportional to 20,780.48, 28,677 and 11,349.04

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Solution

The fourth proportional to 20,780.48, 28,677 and 11,349.04 is: 15,661.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.48 : 28,677 = 11,349.04 : x
  2. Step 2: Convert to fraction form
    20,780.48/28,677 = 11,349.04/x
  3. Step 3: Cross multiply
    20,780.48x = 28,677 × 11,349.04
  4. Step 4: Simplify right side
    20,780.48x = 325,456,420.08
  5. Step 5: Solve for x
    x = 325,456,420.08/20,780.48
  6. Step 6: Final answer
    x = 15,661.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.