Home / 20,574.86-28,393.26-11,143.40

Finding the Fourth Proportional to 20,574.86, 28,393.26 and 11,143.40

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Solution

The fourth proportional to 20,574.86, 28,393.26 and 11,143.40 is: 15,377.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.86 : 28,393.26 = 11,143.40 : x
  2. Step 2: Convert to fraction form
    20,574.86/28,393.26 = 11,143.40/x
  3. Step 3: Cross multiply
    20,574.86x = 28,393.26 × 11,143.40
  4. Step 4: Simplify right side
    20,574.86x = 316,397,453.48
  5. Step 5: Solve for x
    x = 316,397,453.48/20,574.86
  6. Step 6: Final answer
    x = 15,377.87

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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.