Home / 20,658.15-28,507.67-11,226.71

Finding the Fourth Proportional to 20,658.15, 28,507.67 and 11,226.71

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Solution

The fourth proportional to 20,658.15, 28,507.67 and 11,226.71 is: 15,492.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.15 : 28,507.67 = 11,226.71 : x
  2. Step 2: Convert to fraction form
    20,658.15/28,507.67 = 11,226.71/x
  3. Step 3: Cross multiply
    20,658.15x = 28,507.67 × 11,226.71
  4. Step 4: Simplify right side
    20,658.15x = 320,047,343.87
  5. Step 5: Solve for x
    x = 320,047,343.87/20,658.15
  6. Step 6: Final answer
    x = 15,492.55

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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.