Home / 11,439.72-15,786.90-6,471.72

Finding the Fourth Proportional to 11,439.72, 15,786.90 and 6,471.72

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Solution

The fourth proportional to 11,439.72, 15,786.90 and 6,471.72 is: 8,931.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.72 : 15,786.90 = 6,471.72 : x
  2. Step 2: Convert to fraction form
    11,439.72/15,786.90 = 6,471.72/x
  3. Step 3: Cross multiply
    11,439.72x = 15,786.90 × 6,471.72
  4. Step 4: Simplify right side
    11,439.72x = 102,168,396.47
  5. Step 5: Solve for x
    x = 102,168,396.47/11,439.72
  6. Step 6: Final answer
    x = 8,931.02

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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.