Home / 20,289.04-28,026.44-15,291.28

Finding the Fourth Proportional to 20,289.04, 28,026.44 and 15,291.28

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Solution

The fourth proportional to 20,289.04, 28,026.44 and 15,291.28 is: 21,122.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.04 : 28,026.44 = 15,291.28 : x
  2. Step 2: Convert to fraction form
    20,289.04/28,026.44 = 15,291.28/x
  3. Step 3: Cross multiply
    20,289.04x = 28,026.44 × 15,291.28
  4. Step 4: Simplify right side
    20,289.04x = 428,560,141.44
  5. Step 5: Solve for x
    x = 428,560,141.44/20,289.04
  6. Step 6: Final answer
    x = 21,122.74

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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.