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Finding the Fourth Proportional to 28,089.74, 38,764.04 and 15,514.49

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Solution

The fourth proportional to 28,089.74, 38,764.04 and 15,514.49 is: 21,410.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,089.74 : 38,764.04 = 15,514.49 : x
  2. Step 2: Convert to fraction form
    28,089.74/38,764.04 = 15,514.49/x
  3. Step 3: Cross multiply
    28,089.74x = 38,764.04 × 15,514.49
  4. Step 4: Simplify right side
    28,089.74x = 601,404,039.55
  5. Step 5: Solve for x
    x = 601,404,039.55/28,089.74
  6. Step 6: Final answer
    x = 21,410.10

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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.