Home / 20,722.40-31,087.02-8,242.50

Finding the Fourth Proportional to 20,722.40, 31,087.02 and 8,242.50

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Solution

The fourth proportional to 20,722.40, 31,087.02 and 8,242.50 is: 12,365.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.40 : 31,087.02 = 8,242.50 : x
  2. Step 2: Convert to fraction form
    20,722.40/31,087.02 = 8,242.50/x
  3. Step 3: Cross multiply
    20,722.40x = 31,087.02 × 8,242.50
  4. Step 4: Simplify right side
    20,722.40x = 256,234,762.35
  5. Step 5: Solve for x
    x = 256,234,762.35/20,722.40
  6. Step 6: Final answer
    x = 12,365.11

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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.