Home / 12,371.40-18,528.37-12,279.20

Finding the Fourth Proportional to 12,371.40, 18,528.37 and 12,279.20

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Solution

The fourth proportional to 12,371.40, 18,528.37 and 12,279.20 is: 18,390.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,371.40 : 18,528.37 = 12,279.20 : x
  2. Step 2: Convert to fraction form
    12,371.40/18,528.37 = 12,279.20/x
  3. Step 3: Cross multiply
    12,371.40x = 18,528.37 × 12,279.20
  4. Step 4: Simplify right side
    12,371.40x = 227,513,437.56
  5. Step 5: Solve for x
    x = 227,513,437.56/12,371.40
  6. Step 6: Final answer
    x = 18,390.27

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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.