Home / 5,417.78-8,126.60-2,128.57

Finding the Fourth Proportional to 5,417.78, 8,126.60 and 2,128.57

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Solution

The fourth proportional to 5,417.78, 8,126.60 and 2,128.57 is: 3,192.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,417.78 : 8,126.60 = 2,128.57 : x
  2. Step 2: Convert to fraction form
    5,417.78/8,126.60 = 2,128.57/x
  3. Step 3: Cross multiply
    5,417.78x = 8,126.60 × 2,128.57
  4. Step 4: Simplify right side
    5,417.78x = 17,298,006.00
  5. Step 5: Solve for x
    x = 17,298,006.00/5,417.78
  6. Step 6: Final answer
    x = 3,192.82

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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.