Home / 20,073.09-30,128.31-10,219.74

Finding the Fourth Proportional to 20,073.09, 30,128.31 and 10,219.74

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Solution

The fourth proportional to 20,073.09, 30,128.31 and 10,219.74 is: 15,339.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,073.09 : 30,128.31 = 10,219.74 : x
  2. Step 2: Convert to fraction form
    20,073.09/30,128.31 = 10,219.74/x
  3. Step 3: Cross multiply
    20,073.09x = 30,128.31 × 10,219.74
  4. Step 4: Simplify right side
    20,073.09x = 307,903,494.84
  5. Step 5: Solve for x
    x = 307,903,494.84/20,073.09
  6. Step 6: Final answer
    x = 15,339.12

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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.