Home / 39,043.76-53,880.38-21,138.76

Finding the Fourth Proportional to 39,043.76, 53,880.38 and 21,138.76

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Solution

The fourth proportional to 39,043.76, 53,880.38 and 21,138.76 is: 29,171.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.76 : 53,880.38 = 21,138.76 : x
  2. Step 2: Convert to fraction form
    39,043.76/53,880.38 = 21,138.76/x
  3. Step 3: Cross multiply
    39,043.76x = 53,880.38 × 21,138.76
  4. Step 4: Simplify right side
    39,043.76x = 1,138,964,421.53
  5. Step 5: Solve for x
    x = 1,138,964,421.53/39,043.76
  6. Step 6: Final answer
    x = 29,171.48

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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.