Home / 20,383.05-28,116.69-12,817.40

Finding the Fourth Proportional to 20,383.05, 28,116.69 and 12,817.40

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Solution

The fourth proportional to 20,383.05, 28,116.69 and 12,817.40 is: 17,680.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.05 : 28,116.69 = 12,817.40 : x
  2. Step 2: Convert to fraction form
    20,383.05/28,116.69 = 12,817.40/x
  3. Step 3: Cross multiply
    20,383.05x = 28,116.69 × 12,817.40
  4. Step 4: Simplify right side
    20,383.05x = 360,382,862.41
  5. Step 5: Solve for x
    x = 360,382,862.41/20,383.05
  6. Step 6: Final answer
    x = 17,680.52

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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.