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Finding the Fourth Proportional to 15,333.28, 21,159.84 and 8,964.16

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Solution

The fourth proportional to 15,333.28, 21,159.84 and 8,964.16 is: 12,370.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,333.28 : 21,159.84 = 8,964.16 : x
  2. Step 2: Convert to fraction form
    15,333.28/21,159.84 = 8,964.16/x
  3. Step 3: Cross multiply
    15,333.28x = 21,159.84 × 8,964.16
  4. Step 4: Simplify right side
    15,333.28x = 189,680,191.33
  5. Step 5: Solve for x
    x = 189,680,191.33/15,333.28
  6. Step 6: Final answer
    x = 12,370.49

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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.