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Finding the Fourth Proportional to 8,781.84, 12,119.12 and 4,803.21

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Solution

The fourth proportional to 8,781.84, 12,119.12 and 4,803.21 is: 6,628.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.84 : 12,119.12 = 4,803.21 : x
  2. Step 2: Convert to fraction form
    8,781.84/12,119.12 = 4,803.21/x
  3. Step 3: Cross multiply
    8,781.84x = 12,119.12 × 4,803.21
  4. Step 4: Simplify right side
    8,781.84x = 58,210,672.37
  5. Step 5: Solve for x
    x = 58,210,672.37/8,781.84
  6. Step 6: Final answer
    x = 6,628.53

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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.