Home / 9,415.81-12,993.38-5,166.77

Finding the Fourth Proportional to 9,415.81, 12,993.38 and 5,166.77

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Solution

The fourth proportional to 9,415.81, 12,993.38 and 5,166.77 is: 7,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.81 : 12,993.38 = 5,166.77 : x
  2. Step 2: Convert to fraction form
    9,415.81/12,993.38 = 5,166.77/x
  3. Step 3: Cross multiply
    9,415.81x = 12,993.38 × 5,166.77
  4. Step 4: Simplify right side
    9,415.81x = 67,133,741.02
  5. Step 5: Solve for x
    x = 67,133,741.02/9,415.81
  6. Step 6: Final answer
    x = 7,129.90

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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.