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Finding the Fourth Proportional to 37,428, 51,650.64 and 20,661.12

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Solution

The fourth proportional to 37,428, 51,650.64 and 20,661.12 is: 28,512.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,428 : 51,650.64 = 20,661.12 : x
  2. Step 2: Convert to fraction form
    37,428/51,650.64 = 20,661.12/x
  3. Step 3: Cross multiply
    37,428x = 51,650.64 × 20,661.12
  4. Step 4: Simplify right side
    37,428x = 1,067,160,071.12
  5. Step 5: Solve for x
    x = 1,067,160,071.12/37,428
  6. Step 6: Final answer
    x = 28,512.35

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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.