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Finding the Fourth Proportional to 18,354.21, 25,328.81 and 9,970.71

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Solution

The fourth proportional to 18,354.21, 25,328.81 and 9,970.71 is: 13,759.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,354.21 : 25,328.81 = 9,970.71 : x
  2. Step 2: Convert to fraction form
    18,354.21/25,328.81 = 9,970.71/x
  3. Step 3: Cross multiply
    18,354.21x = 25,328.81 × 9,970.71
  4. Step 4: Simplify right side
    18,354.21x = 252,546,169.30
  5. Step 5: Solve for x
    x = 252,546,169.30/18,354.21
  6. Step 6: Final answer
    x = 13,759.58

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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.