Home / 20,358.06-28,099.70-12,400.22

Finding the Fourth Proportional to 20,358.06, 28,099.70 and 12,400.22

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Solution

The fourth proportional to 20,358.06, 28,099.70 and 12,400.22 is: 17,115.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.06 : 28,099.70 = 12,400.22 : x
  2. Step 2: Convert to fraction form
    20,358.06/28,099.70 = 12,400.22/x
  3. Step 3: Cross multiply
    20,358.06x = 28,099.70 × 12,400.22
  4. Step 4: Simplify right side
    20,358.06x = 348,442,461.93
  5. Step 5: Solve for x
    x = 348,442,461.93/20,358.06
  6. Step 6: Final answer
    x = 17,115.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.