Home / 20,888.92-28,827-11,456.86

Finding the Fourth Proportional to 20,888.92, 28,827 and 11,456.86

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Solution

The fourth proportional to 20,888.92, 28,827 and 11,456.86 is: 15,810.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.92 : 28,827 = 11,456.86 : x
  2. Step 2: Convert to fraction form
    20,888.92/28,827 = 11,456.86/x
  3. Step 3: Cross multiply
    20,888.92x = 28,827 × 11,456.86
  4. Step 4: Simplify right side
    20,888.92x = 330,266,903.22
  5. Step 5: Solve for x
    x = 330,266,903.22/20,888.92
  6. Step 6: Final answer
    x = 15,810.63

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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.