Home / 39,840.31-54,977.59-21,931.86

Finding the Fourth Proportional to 39,840.31, 54,977.59 and 21,931.86

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Solution

The fourth proportional to 39,840.31, 54,977.59 and 21,931.86 is: 30,264.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,840.31 : 54,977.59 = 21,931.86 : x
  2. Step 2: Convert to fraction form
    39,840.31/54,977.59 = 21,931.86/x
  3. Step 3: Cross multiply
    39,840.31x = 54,977.59 × 21,931.86
  4. Step 4: Simplify right side
    39,840.31x = 1,205,760,807.02
  5. Step 5: Solve for x
    x = 1,205,760,807.02/39,840.31
  6. Step 6: Final answer
    x = 30,264.85

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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.