Home / 21,518.15-29,691.81-12,084.89

Finding the Fourth Proportional to 21,518.15, 29,691.81 and 12,084.89

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Solution

The fourth proportional to 21,518.15, 29,691.81 and 12,084.89 is: 16,675.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.15 : 29,691.81 = 12,084.89 : x
  2. Step 2: Convert to fraction form
    21,518.15/29,691.81 = 12,084.89/x
  3. Step 3: Cross multiply
    21,518.15x = 29,691.81 × 12,084.89
  4. Step 4: Simplify right side
    21,518.15x = 358,822,109.29
  5. Step 5: Solve for x
    x = 358,822,109.29/21,518.15
  6. Step 6: Final answer
    x = 16,675.33

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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.