Home / 20,578.03-28,397.65-11,146.63

Finding the Fourth Proportional to 20,578.03, 28,397.65 and 11,146.63

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Solution

The fourth proportional to 20,578.03, 28,397.65 and 11,146.63 is: 15,382.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.03 : 28,397.65 = 11,146.63 : x
  2. Step 2: Convert to fraction form
    20,578.03/28,397.65 = 11,146.63/x
  3. Step 3: Cross multiply
    20,578.03x = 28,397.65 × 11,146.63
  4. Step 4: Simplify right side
    20,578.03x = 316,538,097.42
  5. Step 5: Solve for x
    x = 316,538,097.42/20,578.03
  6. Step 6: Final answer
    x = 15,382.33

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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.