Home / 51,471.12-77,243.60-21,909.72

Finding the Fourth Proportional to 51,471.12, 77,243.60 and 21,909.72

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Solution

The fourth proportional to 51,471.12, 77,243.60 and 21,909.72 is: 32,880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,471.12 : 77,243.60 = 21,909.72 : x
  2. Step 2: Convert to fraction form
    51,471.12/77,243.60 = 21,909.72/x
  3. Step 3: Cross multiply
    51,471.12x = 77,243.60 × 21,909.72
  4. Step 4: Simplify right side
    51,471.12x = 1,692,385,647.79
  5. Step 5: Solve for x
    x = 1,692,385,647.79/51,471.12
  6. Step 6: Final answer
    x = 32,880.30

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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.