Home / 21,985.20-30,339.36-13,600.08

Finding the Fourth Proportional to 21,985.20, 30,339.36 and 13,600.08

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Solution

The fourth proportional to 21,985.20, 30,339.36 and 13,600.08 is: 18,767.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.20 : 30,339.36 = 13,600.08 : x
  2. Step 2: Convert to fraction form
    21,985.20/30,339.36 = 13,600.08/x
  3. Step 3: Cross multiply
    21,985.20x = 30,339.36 × 13,600.08
  4. Step 4: Simplify right side
    21,985.20x = 412,617,723.15
  5. Step 5: Solve for x
    x = 412,617,723.15/21,985.20
  6. Step 6: Final answer
    x = 18,767.98

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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.