Home / 20,570.39-28,387.16-11,138.93

Finding the Fourth Proportional to 20,570.39, 28,387.16 and 11,138.93

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Solution

The fourth proportional to 20,570.39, 28,387.16 and 11,138.93 is: 15,371.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.39 : 28,387.16 = 11,138.93 : x
  2. Step 2: Convert to fraction form
    20,570.39/28,387.16 = 11,138.93/x
  3. Step 3: Cross multiply
    20,570.39x = 28,387.16 × 11,138.93
  4. Step 4: Simplify right side
    20,570.39x = 316,202,588.14
  5. Step 5: Solve for x
    x = 316,202,588.14/20,570.39
  6. Step 6: Final answer
    x = 15,371.74

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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.