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Finding the Fourth Proportional to 6,886.76, 10,328.30 and 2,990.28

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Solution

The fourth proportional to 6,886.76, 10,328.30 and 2,990.28 is: 4,484.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,886.76 : 10,328.30 = 2,990.28 : x
  2. Step 2: Convert to fraction form
    6,886.76/10,328.30 = 2,990.28/x
  3. Step 3: Cross multiply
    6,886.76x = 10,328.30 × 2,990.28
  4. Step 4: Simplify right side
    6,886.76x = 30,884,508.92
  5. Step 5: Solve for x
    x = 30,884,508.92/6,886.76
  6. Step 6: Final answer
    x = 4,484.62

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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.