Home / 20,065.10-30,143.78-14,155.58

Finding the Fourth Proportional to 20,065.10, 30,143.78 and 14,155.58

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Solution

The fourth proportional to 20,065.10, 30,143.78 and 14,155.58 is: 21,265.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,065.10 : 30,143.78 = 14,155.58 : x
  2. Step 2: Convert to fraction form
    20,065.10/30,143.78 = 14,155.58/x
  3. Step 3: Cross multiply
    20,065.10x = 30,143.78 × 14,155.58
  4. Step 4: Simplify right side
    20,065.10x = 426,702,689.29
  5. Step 5: Solve for x
    x = 426,702,689.29/20,065.10
  6. Step 6: Final answer
    x = 21,265.91

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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.