Home / 20,429.19-30,645.54-5,638.14

Finding the Fourth Proportional to 20,429.19, 30,645.54 and 5,638.14

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Solution

The fourth proportional to 20,429.19, 30,645.54 and 5,638.14 is: 8,457.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.19 : 30,645.54 = 5,638.14 : x
  2. Step 2: Convert to fraction form
    20,429.19/30,645.54 = 5,638.14/x
  3. Step 3: Cross multiply
    20,429.19x = 30,645.54 × 5,638.14
  4. Step 4: Simplify right side
    20,429.19x = 172,783,844.90
  5. Step 5: Solve for x
    x = 172,783,844.90/20,429.19
  6. Step 6: Final answer
    x = 8,457.69

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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.