Home / 20,569.76-28,386.28-11,138.32

Finding the Fourth Proportional to 20,569.76, 28,386.28 and 11,138.32

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Solution

The fourth proportional to 20,569.76, 28,386.28 and 11,138.32 is: 15,370.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.76 : 28,386.28 = 11,138.32 : x
  2. Step 2: Convert to fraction form
    20,569.76/28,386.28 = 11,138.32/x
  3. Step 3: Cross multiply
    20,569.76x = 28,386.28 × 11,138.32
  4. Step 4: Simplify right side
    20,569.76x = 316,175,470.25
  5. Step 5: Solve for x
    x = 316,175,470.25/20,569.76
  6. Step 6: Final answer
    x = 15,370.89

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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.