Home / 21,436.80-32,155.20-6,645.60

Finding the Fourth Proportional to 21,436.80, 32,155.20 and 6,645.60

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Solution

The fourth proportional to 21,436.80, 32,155.20 and 6,645.60 is: 9,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,436.80 : 32,155.20 = 6,645.60 : x
  2. Step 2: Convert to fraction form
    21,436.80/32,155.20 = 6,645.60/x
  3. Step 3: Cross multiply
    21,436.80x = 32,155.20 × 6,645.60
  4. Step 4: Simplify right side
    21,436.80x = 213,690,597.12
  5. Step 5: Solve for x
    x = 213,690,597.12/21,436.80
  6. Step 6: Final answer
    x = 9,968.40

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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.