Home / 21,938.08-30,243.06-15,639.52

Finding the Fourth Proportional to 21,938.08, 30,243.06 and 15,639.52

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Solution

The fourth proportional to 21,938.08, 30,243.06 and 15,639.52 is: 21,560.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.08 : 30,243.06 = 15,639.52 : x
  2. Step 2: Convert to fraction form
    21,938.08/30,243.06 = 15,639.52/x
  3. Step 3: Cross multiply
    21,938.08x = 30,243.06 × 15,639.52
  4. Step 4: Simplify right side
    21,938.08x = 472,986,941.73
  5. Step 5: Solve for x
    x = 472,986,941.73/21,938.08
  6. Step 6: Final answer
    x = 21,560.09

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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.