Home / 21,345.31-31,938.67-13,410.68

Finding the Fourth Proportional to 21,345.31, 31,938.67 and 13,410.68

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Solution

The fourth proportional to 21,345.31, 31,938.67 and 13,410.68 is: 20,066.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.31 : 31,938.67 = 13,410.68 : x
  2. Step 2: Convert to fraction form
    21,345.31/31,938.67 = 13,410.68/x
  3. Step 3: Cross multiply
    21,345.31x = 31,938.67 × 13,410.68
  4. Step 4: Simplify right side
    21,345.31x = 428,319,089.78
  5. Step 5: Solve for x
    x = 428,319,089.78/21,345.31
  6. Step 6: Final answer
    x = 20,066.19

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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.