Home / 10,990.84-15,164.68-6,515.64

Finding the Fourth Proportional to 10,990.84, 15,164.68 and 6,515.64

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Solution

The fourth proportional to 10,990.84, 15,164.68 and 6,515.64 is: 8,989.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,990.84 : 15,164.68 = 6,515.64 : x
  2. Step 2: Convert to fraction form
    10,990.84/15,164.68 = 6,515.64/x
  3. Step 3: Cross multiply
    10,990.84x = 15,164.68 × 6,515.64
  4. Step 4: Simplify right side
    10,990.84x = 98,807,595.60
  5. Step 5: Solve for x
    x = 98,807,595.60/10,990.84
  6. Step 6: Final answer
    x = 8,989.99

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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.