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Finding the Fourth Proportional to 21,990.10, 32,985.15 and 16,806.10

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Solution

The fourth proportional to 21,990.10, 32,985.15 and 16,806.10 is: 25,209.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.10 : 32,985.15 = 16,806.10 : x
  2. Step 2: Convert to fraction form
    21,990.10/32,985.15 = 16,806.10/x
  3. Step 3: Cross multiply
    21,990.10x = 32,985.15 × 16,806.10
  4. Step 4: Simplify right side
    21,990.10x = 554,351,729.42
  5. Step 5: Solve for x
    x = 554,351,729.42/21,990.10
  6. Step 6: Final answer
    x = 25,209.15

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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.