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Finding the Fourth Proportional to 15,909.93, 21,963.93 and 11,215.17

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Solution

The fourth proportional to 15,909.93, 21,963.93 and 11,215.17 is: 15,482.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.93 : 21,963.93 = 11,215.17 : x
  2. Step 2: Convert to fraction form
    15,909.93/21,963.93 = 11,215.17/x
  3. Step 3: Cross multiply
    15,909.93x = 21,963.93 × 11,215.17
  4. Step 4: Simplify right side
    15,909.93x = 246,329,208.82
  5. Step 5: Solve for x
    x = 246,329,208.82/15,909.93
  6. Step 6: Final answer
    x = 15,482.73

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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.