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Finding the Fourth Proportional to 15,381.62, 21,226.62 and 8,308.04

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Solution

The fourth proportional to 15,381.62, 21,226.62 and 8,308.04 is: 11,465.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,381.62 : 21,226.62 = 8,308.04 : x
  2. Step 2: Convert to fraction form
    15,381.62/21,226.62 = 8,308.04/x
  3. Step 3: Cross multiply
    15,381.62x = 21,226.62 × 8,308.04
  4. Step 4: Simplify right side
    15,381.62x = 176,351,501.89
  5. Step 5: Solve for x
    x = 176,351,501.89/15,381.62
  6. Step 6: Final answer
    x = 11,465.08

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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.