Home / 20,888.10-31,301.64-11,976.12

Finding the Fourth Proportional to 20,888.10, 31,301.64 and 11,976.12

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Solution

The fourth proportional to 20,888.10, 31,301.64 and 11,976.12 is: 17,946.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.10 : 31,301.64 = 11,976.12 : x
  2. Step 2: Convert to fraction form
    20,888.10/31,301.64 = 11,976.12/x
  3. Step 3: Cross multiply
    20,888.10x = 31,301.64 × 11,976.12
  4. Step 4: Simplify right side
    20,888.10x = 374,872,196.84
  5. Step 5: Solve for x
    x = 374,872,196.84/20,888.10
  6. Step 6: Final answer
    x = 17,946.69

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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.