Home / 39,840.06-54,977.24-21,931.61

Finding the Fourth Proportional to 39,840.06, 54,977.24 and 21,931.61

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Solution

The fourth proportional to 39,840.06, 54,977.24 and 21,931.61 is: 30,264.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,840.06 : 54,977.24 = 21,931.61 : x
  2. Step 2: Convert to fraction form
    39,840.06/54,977.24 = 21,931.61/x
  3. Step 3: Cross multiply
    39,840.06x = 54,977.24 × 21,931.61
  4. Step 4: Simplify right side
    39,840.06x = 1,205,739,578.83
  5. Step 5: Solve for x
    x = 1,205,739,578.83/39,840.06
  6. Step 6: Final answer
    x = 30,264.50

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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.