Home / 20,574.76-28,393.32-11,143.40

Finding the Fourth Proportional to 20,574.76, 28,393.32 and 11,143.40

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Solution

The fourth proportional to 20,574.76, 28,393.32 and 11,143.40 is: 15,377.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.76 : 28,393.32 = 11,143.40 : x
  2. Step 2: Convert to fraction form
    20,574.76/28,393.32 = 11,143.40/x
  3. Step 3: Cross multiply
    20,574.76x = 28,393.32 × 11,143.40
  4. Step 4: Simplify right side
    20,574.76x = 316,398,122.09
  5. Step 5: Solve for x
    x = 316,398,122.09/20,574.76
  6. Step 6: Final answer
    x = 15,377.97

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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.