Home / 7,123.64-10,681.31-3,420.81

Finding the Fourth Proportional to 7,123.64, 10,681.31 and 3,420.81

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Solution

The fourth proportional to 7,123.64, 10,681.31 and 3,420.81 is: 5,129.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.64 : 10,681.31 = 3,420.81 : x
  2. Step 2: Convert to fraction form
    7,123.64/10,681.31 = 3,420.81/x
  3. Step 3: Cross multiply
    7,123.64x = 10,681.31 × 3,420.81
  4. Step 4: Simplify right side
    7,123.64x = 36,538,714.96
  5. Step 5: Solve for x
    x = 36,538,714.96/7,123.64
  6. Step 6: Final answer
    x = 5,129.22

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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.