Home / 20,585.69-28,408.28-11,154.25

Finding the Fourth Proportional to 20,585.69, 28,408.28 and 11,154.25

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Solution

The fourth proportional to 20,585.69, 28,408.28 and 11,154.25 is: 15,392.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.69 : 28,408.28 = 11,154.25 : x
  2. Step 2: Convert to fraction form
    20,585.69/28,408.28 = 11,154.25/x
  3. Step 3: Cross multiply
    20,585.69x = 28,408.28 × 11,154.25
  4. Step 4: Simplify right side
    20,585.69x = 316,873,057.19
  5. Step 5: Solve for x
    x = 316,873,057.19/20,585.69
  6. Step 6: Final answer
    x = 15,392.88

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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.