Home / 15,390.18-21,235.77-9,100.26

Finding the Fourth Proportional to 15,390.18, 21,235.77 and 9,100.26

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Solution

The fourth proportional to 15,390.18, 21,235.77 and 9,100.26 is: 12,556.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.18 : 21,235.77 = 9,100.26 : x
  2. Step 2: Convert to fraction form
    15,390.18/21,235.77 = 9,100.26/x
  3. Step 3: Cross multiply
    15,390.18x = 21,235.77 × 9,100.26
  4. Step 4: Simplify right side
    15,390.18x = 193,251,028.30
  5. Step 5: Solve for x
    x = 193,251,028.30/15,390.18
  6. Step 6: Final answer
    x = 12,556.78

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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.