Home / 21,931.81-32,879.26-8,777

Finding the Fourth Proportional to 21,931.81, 32,879.26 and 8,777

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Solution

The fourth proportional to 21,931.81, 32,879.26 and 8,777 is: 13,158.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.81 : 32,879.26 = 8,777 : x
  2. Step 2: Convert to fraction form
    21,931.81/32,879.26 = 8,777/x
  3. Step 3: Cross multiply
    21,931.81x = 32,879.26 × 8,777
  4. Step 4: Simplify right side
    21,931.81x = 288,581,265.02
  5. Step 5: Solve for x
    x = 288,581,265.02/21,931.81
  6. Step 6: Final answer
    x = 13,158.11

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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.