Home / 20,605.12-28,432.48-12,220

Finding the Fourth Proportional to 20,605.12, 28,432.48 and 12,220

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Solution

The fourth proportional to 20,605.12, 28,432.48 and 12,220 is: 16,862.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.12 : 28,432.48 = 12,220 : x
  2. Step 2: Convert to fraction form
    20,605.12/28,432.48 = 12,220/x
  3. Step 3: Cross multiply
    20,605.12x = 28,432.48 × 12,220
  4. Step 4: Simplify right side
    20,605.12x = 347,444,905.60
  5. Step 5: Solve for x
    x = 347,444,905.60/20,605.12
  6. Step 6: Final answer
    x = 16,862.07

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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.