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Finding the Fourth Proportional to 15,089.45, 20,823.05 and 8,374.88

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Solution

The fourth proportional to 15,089.45, 20,823.05 and 8,374.88 is: 11,557.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.45 : 20,823.05 = 8,374.88 : x
  2. Step 2: Convert to fraction form
    15,089.45/20,823.05 = 8,374.88/x
  3. Step 3: Cross multiply
    15,089.45x = 20,823.05 × 8,374.88
  4. Step 4: Simplify right side
    15,089.45x = 174,390,398.99
  5. Step 5: Solve for x
    x = 174,390,398.99/15,089.45
  6. Step 6: Final answer
    x = 11,557.11

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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.