Home / 21,032.20-31,548.30-20,886.40

Finding the Fourth Proportional to 21,032.20, 31,548.30 and 20,886.40

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Solution

The fourth proportional to 21,032.20, 31,548.30 and 20,886.40 is: 31,329.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,032.20 : 31,548.30 = 20,886.40 : x
  2. Step 2: Convert to fraction form
    21,032.20/31,548.30 = 20,886.40/x
  3. Step 3: Cross multiply
    21,032.20x = 31,548.30 × 20,886.40
  4. Step 4: Simplify right side
    21,032.20x = 658,930,413.12
  5. Step 5: Solve for x
    x = 658,930,413.12/21,032.20
  6. Step 6: Final answer
    x = 31,329.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.