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Finding the Fourth Proportional to 61,040.36, 91,574.82 and 18,918.24

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Solution

The fourth proportional to 61,040.36, 91,574.82 and 18,918.24 is: 28,381.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,040.36 : 91,574.82 = 18,918.24 : x
  2. Step 2: Convert to fraction form
    61,040.36/91,574.82 = 18,918.24/x
  3. Step 3: Cross multiply
    61,040.36x = 91,574.82 × 18,918.24
  4. Step 4: Simplify right side
    61,040.36x = 1,732,434,422.72
  5. Step 5: Solve for x
    x = 1,732,434,422.72/61,040.36
  6. Step 6: Final answer
    x = 28,381.79

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1.5x scale

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.