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Finding the Fourth Proportional to 18,934.64, 28,401.06 and 6,454.16

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Solution

The fourth proportional to 18,934.64, 28,401.06 and 6,454.16 is: 9,680.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.64 : 28,401.06 = 6,454.16 : x
  2. Step 2: Convert to fraction form
    18,934.64/28,401.06 = 6,454.16/x
  3. Step 3: Cross multiply
    18,934.64x = 28,401.06 × 6,454.16
  4. Step 4: Simplify right side
    18,934.64x = 183,304,985.41
  5. Step 5: Solve for x
    x = 183,304,985.41/18,934.64
  6. Step 6: Final answer
    x = 9,680.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.