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Finding the Fourth Proportional to 7,874.79, 11,808.35 and 3,436.21

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Solution

The fourth proportional to 7,874.79, 11,808.35 and 3,436.21 is: 5,152.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,874.79 : 11,808.35 = 3,436.21 : x
  2. Step 2: Convert to fraction form
    7,874.79/11,808.35 = 3,436.21/x
  3. Step 3: Cross multiply
    7,874.79x = 11,808.35 × 3,436.21
  4. Step 4: Simplify right side
    7,874.79x = 40,575,953.17
  5. Step 5: Solve for x
    x = 40,575,953.17/7,874.79
  6. Step 6: Final answer
    x = 5,152.64

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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.