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Finding the Fourth Proportional to 28,089.41, 38,763.41 and 15,514.16

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Solution

The fourth proportional to 28,089.41, 38,763.41 and 15,514.16 is: 21,409.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,089.41 : 38,763.41 = 15,514.16 : x
  2. Step 2: Convert to fraction form
    28,089.41/38,763.41 = 15,514.16/x
  3. Step 3: Cross multiply
    28,089.41x = 38,763.41 × 15,514.16
  4. Step 4: Simplify right side
    28,089.41x = 601,381,473.50
  5. Step 5: Solve for x
    x = 601,381,473.50/28,089.41
  6. Step 6: Final answer
    x = 21,409.55

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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.