Home / 11,500.90-15,870.87-6,396.39

Finding the Fourth Proportional to 11,500.90, 15,870.87 and 6,396.39

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Solution

The fourth proportional to 11,500.90, 15,870.87 and 6,396.39 is: 8,826.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,500.90 : 15,870.87 = 6,396.39 : x
  2. Step 2: Convert to fraction form
    11,500.90/15,870.87 = 6,396.39/x
  3. Step 3: Cross multiply
    11,500.90x = 15,870.87 × 6,396.39
  4. Step 4: Simplify right side
    11,500.90x = 101,516,274.16
  5. Step 5: Solve for x
    x = 101,516,274.16/11,500.90
  6. Step 6: Final answer
    x = 8,826.81

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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.