Home / 15,272.48-21,065.14-13,144.30

Finding the Fourth Proportional to 15,272.48, 21,065.14 and 13,144.30

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Solution

The fourth proportional to 15,272.48, 21,065.14 and 13,144.30 is: 18,129.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,272.48 : 21,065.14 = 13,144.30 : x
  2. Step 2: Convert to fraction form
    15,272.48/21,065.14 = 13,144.30/x
  3. Step 3: Cross multiply
    15,272.48x = 21,065.14 × 13,144.30
  4. Step 4: Simplify right side
    15,272.48x = 276,886,519.70
  5. Step 5: Solve for x
    x = 276,886,519.70/15,272.48
  6. Step 6: Final answer
    x = 18,129.77

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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.