Home / 20,585.81-28,408.46-11,154.38

Finding the Fourth Proportional to 20,585.81, 28,408.46 and 11,154.38

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Solution

The fourth proportional to 20,585.81, 28,408.46 and 11,154.38 is: 15,393.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.81 : 28,408.46 = 11,154.38 : x
  2. Step 2: Convert to fraction form
    20,585.81/28,408.46 = 11,154.38/x
  3. Step 3: Cross multiply
    20,585.81x = 28,408.46 × 11,154.38
  4. Step 4: Simplify right side
    20,585.81x = 316,878,560.24
  5. Step 5: Solve for x
    x = 316,878,560.24/20,585.81
  6. Step 6: Final answer
    x = 15,393.06

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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.