Home / 21,878.04-30,194.48-12,318.44

Finding the Fourth Proportional to 21,878.04, 30,194.48 and 12,318.44

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Solution

The fourth proportional to 21,878.04, 30,194.48 and 12,318.44 is: 17,001.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.04 : 30,194.48 = 12,318.44 : x
  2. Step 2: Convert to fraction form
    21,878.04/30,194.48 = 12,318.44/x
  3. Step 3: Cross multiply
    21,878.04x = 30,194.48 × 12,318.44
  4. Step 4: Simplify right side
    21,878.04x = 371,948,890.21
  5. Step 5: Solve for x
    x = 371,948,890.21/21,878.04
  6. Step 6: Final answer
    x = 17,001.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.