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Finding the Fourth Proportional to 18,561.76, 25,617.08 and 10,605.18

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Solution

The fourth proportional to 18,561.76, 25,617.08 and 10,605.18 is: 14,636.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.76 : 25,617.08 = 10,605.18 : x
  2. Step 2: Convert to fraction form
    18,561.76/25,617.08 = 10,605.18/x
  3. Step 3: Cross multiply
    18,561.76x = 25,617.08 × 10,605.18
  4. Step 4: Simplify right side
    18,561.76x = 271,673,744.47
  5. Step 5: Solve for x
    x = 271,673,744.47/18,561.76
  6. Step 6: Final answer
    x = 14,636.21

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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.