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Finding the Fourth Proportional to 18,353.67, 25,328.09 and 9,970.17

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Solution

The fourth proportional to 18,353.67, 25,328.09 and 9,970.17 is: 13,758.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,353.67 : 25,328.09 = 9,970.17 : x
  2. Step 2: Convert to fraction form
    18,353.67/25,328.09 = 9,970.17/x
  3. Step 3: Cross multiply
    18,353.67x = 25,328.09 × 9,970.17
  4. Step 4: Simplify right side
    18,353.67x = 252,525,435.49
  5. Step 5: Solve for x
    x = 252,525,435.49/18,353.67
  6. Step 6: Final answer
    x = 13,758.85

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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.