Home / 21,938.96-30,273.72-13,437.20

Finding the Fourth Proportional to 21,938.96, 30,273.72 and 13,437.20

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Solution

The fourth proportional to 21,938.96, 30,273.72 and 13,437.20 is: 18,542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.96 : 30,273.72 = 13,437.20 : x
  2. Step 2: Convert to fraction form
    21,938.96/30,273.72 = 13,437.20/x
  3. Step 3: Cross multiply
    21,938.96x = 30,273.72 × 13,437.20
  4. Step 4: Simplify right side
    21,938.96x = 406,793,879.02
  5. Step 5: Solve for x
    x = 406,793,879.02/21,938.96
  6. Step 6: Final answer
    x = 18,542.08

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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.