Home / 5,138.02-7,090.45-2,780.16

Finding the Fourth Proportional to 5,138.02, 7,090.45 and 2,780.16

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Solution

The fourth proportional to 5,138.02, 7,090.45 and 2,780.16 is: 3,836.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.02 : 7,090.45 = 2,780.16 : x
  2. Step 2: Convert to fraction form
    5,138.02/7,090.45 = 2,780.16/x
  3. Step 3: Cross multiply
    5,138.02x = 7,090.45 × 2,780.16
  4. Step 4: Simplify right side
    5,138.02x = 19,712,585.47
  5. Step 5: Solve for x
    x = 19,712,585.47/5,138.02
  6. Step 6: Final answer
    x = 3,836.61

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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.