Home / 20,585.49-28,408.02-11,154.05

Finding the Fourth Proportional to 20,585.49, 28,408.02 and 11,154.05

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Solution

The fourth proportional to 20,585.49, 28,408.02 and 11,154.05 is: 15,392.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.49 : 28,408.02 = 11,154.05 : x
  2. Step 2: Convert to fraction form
    20,585.49/28,408.02 = 11,154.05/x
  3. Step 3: Cross multiply
    20,585.49x = 28,408.02 × 11,154.05
  4. Step 4: Simplify right side
    20,585.49x = 316,864,475.48
  5. Step 5: Solve for x
    x = 316,864,475.48/20,585.49
  6. Step 6: Final answer
    x = 15,392.61

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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.