Home / 3,990.59-5,507.54-2,875.22

Finding the Fourth Proportional to 3,990.59, 5,507.54 and 2,875.22

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Solution

The fourth proportional to 3,990.59, 5,507.54 and 2,875.22 is: 3,968.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.59 : 5,507.54 = 2,875.22 : x
  2. Step 2: Convert to fraction form
    3,990.59/5,507.54 = 2,875.22/x
  3. Step 3: Cross multiply
    3,990.59x = 5,507.54 × 2,875.22
  4. Step 4: Simplify right side
    3,990.59x = 15,835,389.16
  5. Step 5: Solve for x
    x = 15,835,389.16/3,990.59
  6. Step 6: Final answer
    x = 3,968.18

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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.