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Finding the Fourth Proportional to 15,894.01, 21,928.66 and 9,178.75

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Solution

The fourth proportional to 15,894.01, 21,928.66 and 9,178.75 is: 12,663.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.01 : 21,928.66 = 9,178.75 : x
  2. Step 2: Convert to fraction form
    15,894.01/21,928.66 = 9,178.75/x
  3. Step 3: Cross multiply
    15,894.01x = 21,928.66 × 9,178.75
  4. Step 4: Simplify right side
    15,894.01x = 201,277,687.98
  5. Step 5: Solve for x
    x = 201,277,687.98/15,894.01
  6. Step 6: Final answer
    x = 12,663.74

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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.