Home / 20,427.86-28,187.37-11,473.65

Finding the Fourth Proportional to 20,427.86, 28,187.37 and 11,473.65

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Solution

The fourth proportional to 20,427.86, 28,187.37 and 11,473.65 is: 15,831.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.86 : 28,187.37 = 11,473.65 : x
  2. Step 2: Convert to fraction form
    20,427.86/28,187.37 = 11,473.65/x
  3. Step 3: Cross multiply
    20,427.86x = 28,187.37 × 11,473.65
  4. Step 4: Simplify right side
    20,427.86x = 323,411,876.86
  5. Step 5: Solve for x
    x = 323,411,876.86/20,427.86
  6. Step 6: Final answer
    x = 15,831.90

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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.