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Finding the Fourth Proportional to 8,971.84, 12,381 and 4,993.36

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Solution

The fourth proportional to 8,971.84, 12,381 and 4,993.36 is: 6,890.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.84 : 12,381 = 4,993.36 : x
  2. Step 2: Convert to fraction form
    8,971.84/12,381 = 4,993.36/x
  3. Step 3: Cross multiply
    8,971.84x = 12,381 × 4,993.36
  4. Step 4: Simplify right side
    8,971.84x = 61,822,790.16
  5. Step 5: Solve for x
    x = 61,822,790.16/8,971.84
  6. Step 6: Final answer
    x = 6,890.76

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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.