Home / 10,990.31-15,166.91-6,515.06

Finding the Fourth Proportional to 10,990.31, 15,166.91 and 6,515.06

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Solution

The fourth proportional to 10,990.31, 15,166.91 and 6,515.06 is: 8,990.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,990.31 : 15,166.91 = 6,515.06 : x
  2. Step 2: Convert to fraction form
    10,990.31/15,166.91 = 6,515.06/x
  3. Step 3: Cross multiply
    10,990.31x = 15,166.91 × 6,515.06
  4. Step 4: Simplify right side
    10,990.31x = 98,813,269.12
  5. Step 5: Solve for x
    x = 98,813,269.12/10,990.31
  6. Step 6: Final answer
    x = 8,990.95

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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.