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Finding the Fourth Proportional to 15,221.08, 21,007.06 and 8,934.04

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Solution

The fourth proportional to 15,221.08, 21,007.06 and 8,934.04 is: 12,330.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.08 : 21,007.06 = 8,934.04 : x
  2. Step 2: Convert to fraction form
    15,221.08/21,007.06 = 8,934.04/x
  3. Step 3: Cross multiply
    15,221.08x = 21,007.06 × 8,934.04
  4. Step 4: Simplify right side
    15,221.08x = 187,677,914.32
  5. Step 5: Solve for x
    x = 187,677,914.32/15,221.08
  6. Step 6: Final answer
    x = 12,330.13

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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.