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Finding the Fourth Proportional to 18,295.71, 25,248.06 and 9,912.21

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Solution

The fourth proportional to 18,295.71, 25,248.06 and 9,912.21 is: 13,678.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,295.71 : 25,248.06 = 9,912.21 : x
  2. Step 2: Convert to fraction form
    18,295.71/25,248.06 = 9,912.21/x
  3. Step 3: Cross multiply
    18,295.71x = 25,248.06 × 9,912.21
  4. Step 4: Simplify right side
    18,295.71x = 250,264,072.81
  5. Step 5: Solve for x
    x = 250,264,072.81/18,295.71
  6. Step 6: Final answer
    x = 13,678.84

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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.