Home / 3,688.89-5,090.90-2,117.22

Finding the Fourth Proportional to 3,688.89, 5,090.90 and 2,117.22

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Solution

The fourth proportional to 3,688.89, 5,090.90 and 2,117.22 is: 2,921.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.89 : 5,090.90 = 2,117.22 : x
  2. Step 2: Convert to fraction form
    3,688.89/5,090.90 = 2,117.22/x
  3. Step 3: Cross multiply
    3,688.89x = 5,090.90 × 2,117.22
  4. Step 4: Simplify right side
    3,688.89x = 10,778,544.71
  5. Step 5: Solve for x
    x = 10,778,544.71/3,688.89
  6. Step 6: Final answer
    x = 2,921.89

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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.