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Finding the Fourth Proportional to 7,159.28, 9,879.78 and 4,015.48

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Solution

The fourth proportional to 7,159.28, 9,879.78 and 4,015.48 is: 5,541.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,159.28 : 9,879.78 = 4,015.48 : x
  2. Step 2: Convert to fraction form
    7,159.28/9,879.78 = 4,015.48/x
  3. Step 3: Cross multiply
    7,159.28x = 9,879.78 × 4,015.48
  4. Step 4: Simplify right side
    7,159.28x = 39,672,058.99
  5. Step 5: Solve for x
    x = 39,672,058.99/7,159.28
  6. Step 6: Final answer
    x = 5,541.35

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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.