Home / 21,938.58-30,243.75-15,640.02

Finding the Fourth Proportional to 21,938.58, 30,243.75 and 15,640.02

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Solution

The fourth proportional to 21,938.58, 30,243.75 and 15,640.02 is: 21,560.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.58 : 30,243.75 = 15,640.02 : x
  2. Step 2: Convert to fraction form
    21,938.58/30,243.75 = 15,640.02/x
  3. Step 3: Cross multiply
    21,938.58x = 30,243.75 × 15,640.02
  4. Step 4: Simplify right side
    21,938.58x = 473,012,854.88
  5. Step 5: Solve for x
    x = 473,012,854.88/21,938.58
  6. Step 6: Final answer
    x = 21,560.78

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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.