Home / 20,670.10-28,531.14-12,171.54

Finding the Fourth Proportional to 20,670.10, 28,531.14 and 12,171.54

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Solution

The fourth proportional to 20,670.10, 28,531.14 and 12,171.54 is: 16,800.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.10 : 28,531.14 = 12,171.54 : x
  2. Step 2: Convert to fraction form
    20,670.10/28,531.14 = 12,171.54/x
  3. Step 3: Cross multiply
    20,670.10x = 28,531.14 × 12,171.54
  4. Step 4: Simplify right side
    20,670.10x = 347,267,911.76
  5. Step 5: Solve for x
    x = 347,267,911.76/20,670.10
  6. Step 6: Final answer
    x = 16,800.50

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1.5x scale

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.