Home / 20,107.04-30,155.70-8,429

Finding the Fourth Proportional to 20,107.04, 30,155.70 and 8,429

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Solution

The fourth proportional to 20,107.04, 30,155.70 and 8,429 is: 12,641.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.04 : 30,155.70 = 8,429 : x
  2. Step 2: Convert to fraction form
    20,107.04/30,155.70 = 8,429/x
  3. Step 3: Cross multiply
    20,107.04x = 30,155.70 × 8,429
  4. Step 4: Simplify right side
    20,107.04x = 254,182,395.30
  5. Step 5: Solve for x
    x = 254,182,395.30/20,107.04
  6. Step 6: Final answer
    x = 12,641.46

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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.