Home / 15,375.20-21,210-11,837.12

Finding the Fourth Proportional to 15,375.20, 21,210 and 11,837.12

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Solution

The fourth proportional to 15,375.20, 21,210 and 11,837.12 is: 16,329.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.20 : 21,210 = 11,837.12 : x
  2. Step 2: Convert to fraction form
    15,375.20/21,210 = 11,837.12/x
  3. Step 3: Cross multiply
    15,375.20x = 21,210 × 11,837.12
  4. Step 4: Simplify right side
    15,375.20x = 251,065,315.20
  5. Step 5: Solve for x
    x = 251,065,315.20/15,375.20
  6. Step 6: Final answer
    x = 16,329.24

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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.