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Finding the Fourth Proportional to 15,177.51, 20,942.55 and 9,208.08

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Solution

The fourth proportional to 15,177.51, 20,942.55 and 9,208.08 is: 12,705.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,177.51 : 20,942.55 = 9,208.08 : x
  2. Step 2: Convert to fraction form
    15,177.51/20,942.55 = 9,208.08/x
  3. Step 3: Cross multiply
    15,177.51x = 20,942.55 × 9,208.08
  4. Step 4: Simplify right side
    15,177.51x = 192,840,675.80
  5. Step 5: Solve for x
    x = 192,840,675.80/15,177.51
  6. Step 6: Final answer
    x = 12,705.69

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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.