Home / 20,574.48-28,392.87-11,143.05

Finding the Fourth Proportional to 20,574.48, 28,392.87 and 11,143.05

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Solution

The fourth proportional to 20,574.48, 28,392.87 and 11,143.05 is: 15,377.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.48 : 28,392.87 = 11,143.05 : x
  2. Step 2: Convert to fraction form
    20,574.48/28,392.87 = 11,143.05/x
  3. Step 3: Cross multiply
    20,574.48x = 28,392.87 × 11,143.05
  4. Step 4: Simplify right side
    20,574.48x = 316,383,170.05
  5. Step 5: Solve for x
    x = 316,383,170.05/20,574.48
  6. Step 6: Final answer
    x = 15,377.46

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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.