Home / 39,436.06-54,419.64-21,530.80

Finding the Fourth Proportional to 39,436.06, 54,419.64 and 21,530.80

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Solution

The fourth proportional to 39,436.06, 54,419.64 and 21,530.80 is: 29,711.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,436.06 : 54,419.64 = 21,530.80 : x
  2. Step 2: Convert to fraction form
    39,436.06/54,419.64 = 21,530.80/x
  3. Step 3: Cross multiply
    39,436.06x = 54,419.64 × 21,530.80
  4. Step 4: Simplify right side
    39,436.06x = 1,171,698,384.91
  5. Step 5: Solve for x
    x = 1,171,698,384.91/39,436.06
  6. Step 6: Final answer
    x = 29,711.35

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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.