Home / 21,460.81-32,149.70-12,072.30

Finding the Fourth Proportional to 21,460.81, 32,149.70 and 12,072.30

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Solution

The fourth proportional to 21,460.81, 32,149.70 and 12,072.30 is: 18,085.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,460.81 : 32,149.70 = 12,072.30 : x
  2. Step 2: Convert to fraction form
    21,460.81/32,149.70 = 12,072.30/x
  3. Step 3: Cross multiply
    21,460.81x = 32,149.70 × 12,072.30
  4. Step 4: Simplify right side
    21,460.81x = 388,120,823.31
  5. Step 5: Solve for x
    x = 388,120,823.31/21,460.81
  6. Step 6: Final answer
    x = 18,085.10

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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.