Home / 20,663.28-30,987.74-8,816.57

Finding the Fourth Proportional to 20,663.28, 30,987.74 and 8,816.57

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Solution

The fourth proportional to 20,663.28, 30,987.74 and 8,816.57 is: 13,221.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.28 : 30,987.74 = 8,816.57 : x
  2. Step 2: Convert to fraction form
    20,663.28/30,987.74 = 8,816.57/x
  3. Step 3: Cross multiply
    20,663.28x = 30,987.74 × 8,816.57
  4. Step 4: Simplify right side
    20,663.28x = 273,205,624.51
  5. Step 5: Solve for x
    x = 273,205,624.51/20,663.28
  6. Step 6: Final answer
    x = 13,221.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.