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Finding the Fourth Proportional to 8,968.84, 12,376.68 and 4,990.12

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Solution

The fourth proportional to 8,968.84, 12,376.68 and 4,990.12 is: 6,886.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.84 : 12,376.68 = 4,990.12 : x
  2. Step 2: Convert to fraction form
    8,968.84/12,376.68 = 4,990.12/x
  3. Step 3: Cross multiply
    8,968.84x = 12,376.68 × 4,990.12
  4. Step 4: Simplify right side
    8,968.84x = 61,761,118.40
  5. Step 5: Solve for x
    x = 61,761,118.40/8,968.84
  6. Step 6: Final answer
    x = 6,886.19

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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.