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Finding the Fourth Proportional to 18,273.65, 25,217.72 and 9,890.15

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Solution

The fourth proportional to 18,273.65, 25,217.72 and 9,890.15 is: 13,648.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,273.65 : 25,217.72 = 9,890.15 : x
  2. Step 2: Convert to fraction form
    18,273.65/25,217.72 = 9,890.15/x
  3. Step 3: Cross multiply
    18,273.65x = 25,217.72 × 9,890.15
  4. Step 4: Simplify right side
    18,273.65x = 249,407,033.46
  5. Step 5: Solve for x
    x = 249,407,033.46/18,273.65
  6. Step 6: Final answer
    x = 13,648.45

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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.