Home / 21,989.60-32,984.40-12,148.10

Finding the Fourth Proportional to 21,989.60, 32,984.40 and 12,148.10

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Solution

The fourth proportional to 21,989.60, 32,984.40 and 12,148.10 is: 18,222.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.60 : 32,984.40 = 12,148.10 : x
  2. Step 2: Convert to fraction form
    21,989.60/32,984.40 = 12,148.10/x
  3. Step 3: Cross multiply
    21,989.60x = 32,984.40 × 12,148.10
  4. Step 4: Simplify right side
    21,989.60x = 400,697,789.64
  5. Step 5: Solve for x
    x = 400,697,789.64/21,989.60
  6. Step 6: Final answer
    x = 18,222.15

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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.