Home / 19,555.20-26,979.57-12,485.70

Finding the Fourth Proportional to 19,555.20, 26,979.57 and 12,485.70

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Solution

The fourth proportional to 19,555.20, 26,979.57 and 12,485.70 is: 17,226.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,555.20 : 26,979.57 = 12,485.70 : x
  2. Step 2: Convert to fraction form
    19,555.20/26,979.57 = 12,485.70/x
  3. Step 3: Cross multiply
    19,555.20x = 26,979.57 × 12,485.70
  4. Step 4: Simplify right side
    19,555.20x = 336,858,817.15
  5. Step 5: Solve for x
    x = 336,858,817.15/19,555.20
  6. Step 6: Final answer
    x = 17,226.05

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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.