Home / 15,084.42-20,815.56-9,112.56

Finding the Fourth Proportional to 15,084.42, 20,815.56 and 9,112.56

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Solution

The fourth proportional to 15,084.42, 20,815.56 and 9,112.56 is: 12,574.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,084.42 : 20,815.56 = 9,112.56 : x
  2. Step 2: Convert to fraction form
    15,084.42/20,815.56 = 9,112.56/x
  3. Step 3: Cross multiply
    15,084.42x = 20,815.56 × 9,112.56
  4. Step 4: Simplify right side
    15,084.42x = 189,683,039.43
  5. Step 5: Solve for x
    x = 189,683,039.43/15,084.42
  6. Step 6: Final answer
    x = 12,574.77

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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.