Home / 15,109.20-22,642.20-11,129.40

Finding the Fourth Proportional to 15,109.20, 22,642.20 and 11,129.40

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Solution

The fourth proportional to 15,109.20, 22,642.20 and 11,129.40 is: 16,678.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,109.20 : 22,642.20 = 11,129.40 : x
  2. Step 2: Convert to fraction form
    15,109.20/22,642.20 = 11,129.40/x
  3. Step 3: Cross multiply
    15,109.20x = 22,642.20 × 11,129.40
  4. Step 4: Simplify right side
    15,109.20x = 251,994,100.68
  5. Step 5: Solve for x
    x = 251,994,100.68/15,109.20
  6. Step 6: Final answer
    x = 16,678.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.