Home / 20,574.47-28,392.72-11,143.03

Finding the Fourth Proportional to 20,574.47, 28,392.72 and 11,143.03

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Solution

The fourth proportional to 20,574.47, 28,392.72 and 11,143.03 is: 15,377.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.47 : 28,392.72 = 11,143.03 : x
  2. Step 2: Convert to fraction form
    20,574.47/28,392.72 = 11,143.03/x
  3. Step 3: Cross multiply
    20,574.47x = 28,392.72 × 11,143.03
  4. Step 4: Simplify right side
    20,574.47x = 316,380,930.74
  5. Step 5: Solve for x
    x = 316,380,930.74/20,574.47
  6. Step 6: Final answer
    x = 15,377.36

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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.