Home / 7,111.45-9,812.50-6,115.15

Finding the Fourth Proportional to 7,111.45, 9,812.50 and 6,115.15

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Solution

The fourth proportional to 7,111.45, 9,812.50 and 6,115.15 is: 8,437.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.45 : 9,812.50 = 6,115.15 : x
  2. Step 2: Convert to fraction form
    7,111.45/9,812.50 = 6,115.15/x
  3. Step 3: Cross multiply
    7,111.45x = 9,812.50 × 6,115.15
  4. Step 4: Simplify right side
    7,111.45x = 60,004,909.38
  5. Step 5: Solve for x
    x = 60,004,909.38/7,111.45
  6. Step 6: Final answer
    x = 8,437.79

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Half scale
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Double scale
Find fourth proportional to 7,112.45, 9,813.88 and 6,116.15
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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.