Home / 13,749.74-18,979.20-9,782.36

Finding the Fourth Proportional to 13,749.74, 18,979.20 and 9,782.36

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Solution

The fourth proportional to 13,749.74, 18,979.20 and 9,782.36 is: 13,502.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.74 : 18,979.20 = 9,782.36 : x
  2. Step 2: Convert to fraction form
    13,749.74/18,979.20 = 9,782.36/x
  3. Step 3: Cross multiply
    13,749.74x = 18,979.20 × 9,782.36
  4. Step 4: Simplify right side
    13,749.74x = 185,661,366.91
  5. Step 5: Solve for x
    x = 185,661,366.91/13,749.74
  6. Step 6: Final answer
    x = 13,502.90

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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.