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Finding the Fourth Proportional to 15,111.91, 20,848.80 and 9,366.77

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Solution

The fourth proportional to 15,111.91, 20,848.80 and 9,366.77 is: 12,922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.91 : 20,848.80 = 9,366.77 : x
  2. Step 2: Convert to fraction form
    15,111.91/20,848.80 = 9,366.77/x
  3. Step 3: Cross multiply
    15,111.91x = 20,848.80 × 9,366.77
  4. Step 4: Simplify right side
    15,111.91x = 195,285,914.38
  5. Step 5: Solve for x
    x = 195,285,914.38/15,111.91
  6. Step 6: Final answer
    x = 12,922.65

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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.