Home / 20,719.48-31,068.78-10,190.20

Finding the Fourth Proportional to 20,719.48, 31,068.78 and 10,190.20

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Solution

The fourth proportional to 20,719.48, 31,068.78 and 10,190.20 is: 15,280.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.48 : 31,068.78 = 10,190.20 : x
  2. Step 2: Convert to fraction form
    20,719.48/31,068.78 = 10,190.20/x
  3. Step 3: Cross multiply
    20,719.48x = 31,068.78 × 10,190.20
  4. Step 4: Simplify right side
    20,719.48x = 316,597,081.96
  5. Step 5: Solve for x
    x = 316,597,081.96/20,719.48
  6. Step 6: Final answer
    x = 15,280.17

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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.