Home / 20,415.40-28,166.34-12,967.72

Finding the Fourth Proportional to 20,415.40, 28,166.34 and 12,967.72

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Solution

The fourth proportional to 20,415.40, 28,166.34 and 12,967.72 is: 17,891.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.40 : 28,166.34 = 12,967.72 : x
  2. Step 2: Convert to fraction form
    20,415.40/28,166.34 = 12,967.72/x
  3. Step 3: Cross multiply
    20,415.40x = 28,166.34 × 12,967.72
  4. Step 4: Simplify right side
    20,415.40x = 365,253,210.54
  5. Step 5: Solve for x
    x = 365,253,210.54/20,415.40
  6. Step 6: Final answer
    x = 17,891.06

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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.