Home / 18,631.60-27,979.80-13,123.60

Finding the Fourth Proportional to 18,631.60, 27,979.80 and 13,123.60

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Solution

The fourth proportional to 18,631.60, 27,979.80 and 13,123.60 is: 19,708.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,631.60 : 27,979.80 = 13,123.60 : x
  2. Step 2: Convert to fraction form
    18,631.60/27,979.80 = 13,123.60/x
  3. Step 3: Cross multiply
    18,631.60x = 27,979.80 × 13,123.60
  4. Step 4: Simplify right side
    18,631.60x = 367,195,703.28
  5. Step 5: Solve for x
    x = 367,195,703.28/18,631.60
  6. Step 6: Final answer
    x = 19,708.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.