Home / 20,330.81-28,056.66-11,379.14

Finding the Fourth Proportional to 20,330.81, 28,056.66 and 11,379.14

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Solution

The fourth proportional to 20,330.81, 28,056.66 and 11,379.14 is: 15,703.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.81 : 28,056.66 = 11,379.14 : x
  2. Step 2: Convert to fraction form
    20,330.81/28,056.66 = 11,379.14/x
  3. Step 3: Cross multiply
    20,330.81x = 28,056.66 × 11,379.14
  4. Step 4: Simplify right side
    20,330.81x = 319,260,689.54
  5. Step 5: Solve for x
    x = 319,260,689.54/20,330.81
  6. Step 6: Final answer
    x = 15,703.30

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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.