Home / 15,128.27-20,875.42-8,412.81

Finding the Fourth Proportional to 15,128.27, 20,875.42 and 8,412.81

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Solution

The fourth proportional to 15,128.27, 20,875.42 and 8,412.81 is: 11,608.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.27 : 20,875.42 = 8,412.81 : x
  2. Step 2: Convert to fraction form
    15,128.27/20,875.42 = 8,412.81/x
  3. Step 3: Cross multiply
    15,128.27x = 20,875.42 × 8,412.81
  4. Step 4: Simplify right side
    15,128.27x = 175,620,942.13
  5. Step 5: Solve for x
    x = 175,620,942.13/15,128.27
  6. Step 6: Final answer
    x = 11,608.79

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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.