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Finding the Fourth Proportional to 7,857.58, 10,839.13 and 4,981.05

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Solution

The fourth proportional to 7,857.58, 10,839.13 and 4,981.05 is: 6,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.58 : 10,839.13 = 4,981.05 : x
  2. Step 2: Convert to fraction form
    7,857.58/10,839.13 = 4,981.05/x
  3. Step 3: Cross multiply
    7,857.58x = 10,839.13 × 4,981.05
  4. Step 4: Simplify right side
    7,857.58x = 53,990,248.49
  5. Step 5: Solve for x
    x = 53,990,248.49/7,857.58
  6. Step 6: Final answer
    x = 6,871.10

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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.