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Finding the Fourth Proportional to 5,390.51, 8,085.51 and 2,104.20

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Solution

The fourth proportional to 5,390.51, 8,085.51 and 2,104.20 is: 3,156.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.51 : 8,085.51 = 2,104.20 : x
  2. Step 2: Convert to fraction form
    5,390.51/8,085.51 = 2,104.20/x
  3. Step 3: Cross multiply
    5,390.51x = 8,085.51 × 2,104.20
  4. Step 4: Simplify right side
    5,390.51x = 17,013,530.14
  5. Step 5: Solve for x
    x = 17,013,530.14/5,390.51
  6. Step 6: Final answer
    x = 3,156.20

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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.