Home / 18,947.94-26,128.78-12,572.28

Finding the Fourth Proportional to 18,947.94, 26,128.78 and 12,572.28

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Solution

The fourth proportional to 18,947.94, 26,128.78 and 12,572.28 is: 17,336.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.94 : 26,128.78 = 12,572.28 : x
  2. Step 2: Convert to fraction form
    18,947.94/26,128.78 = 12,572.28/x
  3. Step 3: Cross multiply
    18,947.94x = 26,128.78 × 12,572.28
  4. Step 4: Simplify right side
    18,947.94x = 328,498,338.22
  5. Step 5: Solve for x
    x = 328,498,338.22/18,947.94
  6. Step 6: Final answer
    x = 17,336.89

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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.