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Finding the Fourth Proportional to 7,857.95, 11,787.08 and 6,290.68

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Solution

The fourth proportional to 7,857.95, 11,787.08 and 6,290.68 is: 9,436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.95 : 11,787.08 = 6,290.68 : x
  2. Step 2: Convert to fraction form
    7,857.95/11,787.08 = 6,290.68/x
  3. Step 3: Cross multiply
    7,857.95x = 11,787.08 × 6,290.68
  4. Step 4: Simplify right side
    7,857.95x = 74,148,748.41
  5. Step 5: Solve for x
    x = 74,148,748.41/7,857.95
  6. Step 6: Final answer
    x = 9,436.14

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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.