Home / 20,578.73-28,398.65-12,079.17

Finding the Fourth Proportional to 20,578.73, 28,398.65 and 12,079.17

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Solution

The fourth proportional to 20,578.73, 28,398.65 and 12,079.17 is: 16,669.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.73 : 28,398.65 = 12,079.17 : x
  2. Step 2: Convert to fraction form
    20,578.73/28,398.65 = 12,079.17/x
  3. Step 3: Cross multiply
    20,578.73x = 28,398.65 × 12,079.17
  4. Step 4: Simplify right side
    20,578.73x = 343,032,060.72
  5. Step 5: Solve for x
    x = 343,032,060.72/20,578.73
  6. Step 6: Final answer
    x = 16,669.26

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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.