Home / 39,989.59-55,184.76-21,839.71

Finding the Fourth Proportional to 39,989.59, 55,184.76 and 21,839.71

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Solution

The fourth proportional to 39,989.59, 55,184.76 and 21,839.71 is: 30,138.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,989.59 : 55,184.76 = 21,839.71 : x
  2. Step 2: Convert to fraction form
    39,989.59/55,184.76 = 21,839.71/x
  3. Step 3: Cross multiply
    39,989.59x = 55,184.76 × 21,839.71
  4. Step 4: Simplify right side
    39,989.59x = 1,205,219,154.82
  5. Step 5: Solve for x
    x = 1,205,219,154.82/39,989.59
  6. Step 6: Final answer
    x = 30,138.32

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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.