Home / 21,990.10-32,985.15-12,148.60

Finding the Fourth Proportional to 21,990.10, 32,985.15 and 12,148.60

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Solution

The fourth proportional to 21,990.10, 32,985.15 and 12,148.60 is: 18,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.10 : 32,985.15 = 12,148.60 : x
  2. Step 2: Convert to fraction form
    21,990.10/32,985.15 = 12,148.60/x
  3. Step 3: Cross multiply
    21,990.10x = 32,985.15 × 12,148.60
  4. Step 4: Simplify right side
    21,990.10x = 400,723,393.29
  5. Step 5: Solve for x
    x = 400,723,393.29/21,990.10
  6. Step 6: Final answer
    x = 18,222.90

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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.