Home / 10,986.72-15,159.30-6,511.86

Finding the Fourth Proportional to 10,986.72, 15,159.30 and 6,511.86

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Solution

The fourth proportional to 10,986.72, 15,159.30 and 6,511.86 is: 8,984.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,986.72 : 15,159.30 = 6,511.86 : x
  2. Step 2: Convert to fraction form
    10,986.72/15,159.30 = 6,511.86/x
  3. Step 3: Cross multiply
    10,986.72x = 15,159.30 × 6,511.86
  4. Step 4: Simplify right side
    10,986.72x = 98,715,239.30
  5. Step 5: Solve for x
    x = 98,715,239.30/10,986.72
  6. Step 6: Final answer
    x = 8,984.96

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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.