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Finding the Fourth Proportional to 15,196.95, 20,963.07 and 9,143.01

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Solution

The fourth proportional to 15,196.95, 20,963.07 and 9,143.01 is: 12,612.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,196.95 : 20,963.07 = 9,143.01 : x
  2. Step 2: Convert to fraction form
    15,196.95/20,963.07 = 9,143.01/x
  3. Step 3: Cross multiply
    15,196.95x = 20,963.07 × 9,143.01
  4. Step 4: Simplify right side
    15,196.95x = 191,665,558.64
  5. Step 5: Solve for x
    x = 191,665,558.64/15,196.95
  6. Step 6: Final answer
    x = 12,612.11

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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.