Home / 8,921.57-12,313.48-5,147.17

Finding the Fourth Proportional to 8,921.57, 12,313.48 and 5,147.17

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Solution

The fourth proportional to 8,921.57, 12,313.48 and 5,147.17 is: 7,104.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.57 : 12,313.48 = 5,147.17 : x
  2. Step 2: Convert to fraction form
    8,921.57/12,313.48 = 5,147.17/x
  3. Step 3: Cross multiply
    8,921.57x = 12,313.48 × 5,147.17
  4. Step 4: Simplify right side
    8,921.57x = 63,379,550.50
  5. Step 5: Solve for x
    x = 63,379,550.50/8,921.57
  6. Step 6: Final answer
    x = 7,104.08

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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.