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Finding the Fourth Proportional to 15,186.48, 20,947.32 and 8,894.40

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Solution

The fourth proportional to 15,186.48, 20,947.32 and 8,894.40 is: 12,268.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,186.48 : 20,947.32 = 8,894.40 : x
  2. Step 2: Convert to fraction form
    15,186.48/20,947.32 = 8,894.40/x
  3. Step 3: Cross multiply
    15,186.48x = 20,947.32 × 8,894.40
  4. Step 4: Simplify right side
    15,186.48x = 186,313,843.01
  5. Step 5: Solve for x
    x = 186,313,843.01/15,186.48
  6. Step 6: Final answer
    x = 12,268.40

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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.