Home / 21,191.76-29,378.62-20,068.30

Finding the Fourth Proportional to 21,191.76, 29,378.62 and 20,068.30

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Solution

The fourth proportional to 21,191.76, 29,378.62 and 20,068.30 is: 27,821.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.76 : 29,378.62 = 20,068.30 : x
  2. Step 2: Convert to fraction form
    21,191.76/29,378.62 = 20,068.30/x
  3. Step 3: Cross multiply
    21,191.76x = 29,378.62 × 20,068.30
  4. Step 4: Simplify right side
    21,191.76x = 589,578,959.75
  5. Step 5: Solve for x
    x = 589,578,959.75/21,191.76
  6. Step 6: Final answer
    x = 27,821.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.