Home / 11,316.78-15,617.87-6,281.21

Finding the Fourth Proportional to 11,316.78, 15,617.87 and 6,281.21

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Solution

The fourth proportional to 11,316.78, 15,617.87 and 6,281.21 is: 8,668.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,316.78 : 15,617.87 = 6,281.21 : x
  2. Step 2: Convert to fraction form
    11,316.78/15,617.87 = 6,281.21/x
  3. Step 3: Cross multiply
    11,316.78x = 15,617.87 × 6,281.21
  4. Step 4: Simplify right side
    11,316.78x = 98,099,011.73
  5. Step 5: Solve for x
    x = 98,099,011.73/11,316.78
  6. Step 6: Final answer
    x = 8,668.46

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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.