Home / 20,608.40-28,459.80-14,251.28

Finding the Fourth Proportional to 20,608.40, 28,459.80 and 14,251.28

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Solution

The fourth proportional to 20,608.40, 28,459.80 and 14,251.28 is: 19,680.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.40 : 28,459.80 = 14,251.28 : x
  2. Step 2: Convert to fraction form
    20,608.40/28,459.80 = 14,251.28/x
  3. Step 3: Cross multiply
    20,608.40x = 28,459.80 × 14,251.28
  4. Step 4: Simplify right side
    20,608.40x = 405,588,578.54
  5. Step 5: Solve for x
    x = 405,588,578.54/20,608.40
  6. Step 6: Final answer
    x = 19,680.74

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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.