Home / 3,688.40-5,090.40-2,116.48

Finding the Fourth Proportional to 3,688.40, 5,090.40 and 2,116.48

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Solution

The fourth proportional to 3,688.40, 5,090.40 and 2,116.48 is: 2,920.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.40 : 5,090.40 = 2,116.48 : x
  2. Step 2: Convert to fraction form
    3,688.40/5,090.40 = 2,116.48/x
  3. Step 3: Cross multiply
    3,688.40x = 5,090.40 × 2,116.48
  4. Step 4: Simplify right side
    3,688.40x = 10,773,729.79
  5. Step 5: Solve for x
    x = 10,773,729.79/3,688.40
  6. Step 6: Final answer
    x = 2,920.98

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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.