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Finding the Fourth Proportional to 9,381.78, 12,946.05 and 5,188.98

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Solution

The fourth proportional to 9,381.78, 12,946.05 and 5,188.98 is: 7,160.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,381.78 : 12,946.05 = 5,188.98 : x
  2. Step 2: Convert to fraction form
    9,381.78/12,946.05 = 5,188.98/x
  3. Step 3: Cross multiply
    9,381.78x = 12,946.05 × 5,188.98
  4. Step 4: Simplify right side
    9,381.78x = 67,176,794.53
  5. Step 5: Solve for x
    x = 67,176,794.53/9,381.78
  6. Step 6: Final answer
    x = 7,160.35

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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.