Home / 10,919.90-15,053.57-8,682.68

Finding the Fourth Proportional to 10,919.90, 15,053.57 and 8,682.68

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Solution

The fourth proportional to 10,919.90, 15,053.57 and 8,682.68 is: 11,969.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.90 : 15,053.57 = 8,682.68 : x
  2. Step 2: Convert to fraction form
    10,919.90/15,053.57 = 8,682.68/x
  3. Step 3: Cross multiply
    10,919.90x = 15,053.57 × 8,682.68
  4. Step 4: Simplify right side
    10,919.90x = 130,705,331.17
  5. Step 5: Solve for x
    x = 130,705,331.17/10,919.90
  6. Step 6: Final answer
    x = 11,969.46

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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.