Home / 13,395.20-18,486.36-7,427.40

Finding the Fourth Proportional to 13,395.20, 18,486.36 and 7,427.40

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Solution

The fourth proportional to 13,395.20, 18,486.36 and 7,427.40 is: 10,250.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,395.20 : 18,486.36 = 7,427.40 : x
  2. Step 2: Convert to fraction form
    13,395.20/18,486.36 = 7,427.40/x
  3. Step 3: Cross multiply
    13,395.20x = 18,486.36 × 7,427.40
  4. Step 4: Simplify right side
    13,395.20x = 137,305,590.26
  5. Step 5: Solve for x
    x = 137,305,590.26/13,395.20
  6. Step 6: Final answer
    x = 10,250.36

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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.