Home / 20,936.77-28,894.35-11,987.08

Finding the Fourth Proportional to 20,936.77, 28,894.35 and 11,987.08

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Solution

The fourth proportional to 20,936.77, 28,894.35 and 11,987.08 is: 16,543.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.77 : 28,894.35 = 11,987.08 : x
  2. Step 2: Convert to fraction form
    20,936.77/28,894.35 = 11,987.08/x
  3. Step 3: Cross multiply
    20,936.77x = 28,894.35 × 11,987.08
  4. Step 4: Simplify right side
    20,936.77x = 346,358,885.00
  5. Step 5: Solve for x
    x = 346,358,885.00/20,936.77
  6. Step 6: Final answer
    x = 16,543.09

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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.