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Finding the Fourth Proportional to 31,390, 43,318.24 and 17,243.12

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Solution

The fourth proportional to 31,390, 43,318.24 and 17,243.12 is: 23,795.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,390 : 43,318.24 = 17,243.12 : x
  2. Step 2: Convert to fraction form
    31,390/43,318.24 = 17,243.12/x
  3. Step 3: Cross multiply
    31,390x = 43,318.24 × 17,243.12
  4. Step 4: Simplify right side
    31,390x = 746,941,610.51
  5. Step 5: Solve for x
    x = 746,941,610.51/31,390
  6. Step 6: Final answer
    x = 23,795.53

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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.