Home / 20,569.91-28,386.42-11,138.47

Finding the Fourth Proportional to 20,569.91, 28,386.42 and 11,138.47

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Solution

The fourth proportional to 20,569.91, 28,386.42 and 11,138.47 is: 15,371.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.91 : 28,386.42 = 11,138.47 : x
  2. Step 2: Convert to fraction form
    20,569.91/28,386.42 = 11,138.47/x
  3. Step 3: Cross multiply
    20,569.91x = 28,386.42 × 11,138.47
  4. Step 4: Simplify right side
    20,569.91x = 316,181,329.35
  5. Step 5: Solve for x
    x = 316,181,329.35/20,569.91
  6. Step 6: Final answer
    x = 15,371.06

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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.