Home / 8,749.80-12,078.81-5,607.78

Finding the Fourth Proportional to 8,749.80, 12,078.81 and 5,607.78

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Solution

The fourth proportional to 8,749.80, 12,078.81 and 5,607.78 is: 7,741.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,749.80 : 12,078.81 = 5,607.78 : x
  2. Step 2: Convert to fraction form
    8,749.80/12,078.81 = 5,607.78/x
  3. Step 3: Cross multiply
    8,749.80x = 12,078.81 × 5,607.78
  4. Step 4: Simplify right side
    8,749.80x = 67,735,309.14
  5. Step 5: Solve for x
    x = 67,735,309.14/8,749.80
  6. Step 6: Final answer
    x = 7,741.36

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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.