Home / 12,939.08-17,856.66-9,789.80

Finding the Fourth Proportional to 12,939.08, 17,856.66 and 9,789.80

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Solution

The fourth proportional to 12,939.08, 17,856.66 and 9,789.80 is: 13,510.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.08 : 17,856.66 = 9,789.80 : x
  2. Step 2: Convert to fraction form
    12,939.08/17,856.66 = 9,789.80/x
  3. Step 3: Cross multiply
    12,939.08x = 17,856.66 × 9,789.80
  4. Step 4: Simplify right side
    12,939.08x = 174,813,130.07
  5. Step 5: Solve for x
    x = 174,813,130.07/12,939.08
  6. Step 6: Final answer
    x = 13,510.48

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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.