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Finding the Fourth Proportional to 14,979.42, 22,473.93 and 7,188.78

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Solution

The fourth proportional to 14,979.42, 22,473.93 and 7,188.78 is: 10,785.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.42 : 22,473.93 = 7,188.78 : x
  2. Step 2: Convert to fraction form
    14,979.42/22,473.93 = 7,188.78/x
  3. Step 3: Cross multiply
    14,979.42x = 22,473.93 × 7,188.78
  4. Step 4: Simplify right side
    14,979.42x = 161,560,138.51
  5. Step 5: Solve for x
    x = 161,560,138.51/14,979.42
  6. Step 6: Final answer
    x = 10,785.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.