Home / 20,585.75-28,408.41-11,154.30

Finding the Fourth Proportional to 20,585.75, 28,408.41 and 11,154.30

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Solution

The fourth proportional to 20,585.75, 28,408.41 and 11,154.30 is: 15,392.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.75 : 28,408.41 = 11,154.30 : x
  2. Step 2: Convert to fraction form
    20,585.75/28,408.41 = 11,154.30/x
  3. Step 3: Cross multiply
    20,585.75x = 28,408.41 × 11,154.30
  4. Step 4: Simplify right side
    20,585.75x = 316,875,927.66
  5. Step 5: Solve for x
    x = 316,875,927.66/20,585.75
  6. Step 6: Final answer
    x = 15,392.98

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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.