Home / 20,051.08-30,059.71-12,639.20

Finding the Fourth Proportional to 20,051.08, 30,059.71 and 12,639.20

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Solution

The fourth proportional to 20,051.08, 30,059.71 and 12,639.20 is: 18,948.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,051.08 : 30,059.71 = 12,639.20 : x
  2. Step 2: Convert to fraction form
    20,051.08/30,059.71 = 12,639.20/x
  3. Step 3: Cross multiply
    20,051.08x = 30,059.71 × 12,639.20
  4. Step 4: Simplify right side
    20,051.08x = 379,930,673.82
  5. Step 5: Solve for x
    x = 379,930,673.82/20,051.08
  6. Step 6: Final answer
    x = 18,948.14

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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.