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Finding the Fourth Proportional to 15,089.06, 20,822.85 and 8,374.76

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Solution

The fourth proportional to 15,089.06, 20,822.85 and 8,374.76 is: 11,557.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.06 : 20,822.85 = 8,374.76 : x
  2. Step 2: Convert to fraction form
    15,089.06/20,822.85 = 8,374.76/x
  3. Step 3: Cross multiply
    15,089.06x = 20,822.85 × 8,374.76
  4. Step 4: Simplify right side
    15,089.06x = 174,386,267.15
  5. Step 5: Solve for x
    x = 174,386,267.15/15,089.06
  6. Step 6: Final answer
    x = 11,557.14

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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.