Home / 20,947.92-28,899.09-11,988.51

Finding the Fourth Proportional to 20,947.92, 28,899.09 and 11,988.51

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Solution

The fourth proportional to 20,947.92, 28,899.09 and 11,988.51 is: 16,538.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.92 : 28,899.09 = 11,988.51 : x
  2. Step 2: Convert to fraction form
    20,947.92/28,899.09 = 11,988.51/x
  3. Step 3: Cross multiply
    20,947.92x = 28,899.09 × 11,988.51
  4. Step 4: Simplify right side
    20,947.92x = 346,457,029.46
  5. Step 5: Solve for x
    x = 346,457,029.46/20,947.92
  6. Step 6: Final answer
    x = 16,538.97

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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.