Home / 39,126.74-53,995.05-21,221.90

Finding the Fourth Proportional to 39,126.74, 53,995.05 and 21,221.90

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Solution

The fourth proportional to 39,126.74, 53,995.05 and 21,221.90 is: 29,286.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,126.74 : 53,995.05 = 21,221.90 : x
  2. Step 2: Convert to fraction form
    39,126.74/53,995.05 = 21,221.90/x
  3. Step 3: Cross multiply
    39,126.74x = 53,995.05 × 21,221.90
  4. Step 4: Simplify right side
    39,126.74x = 1,145,877,551.60
  5. Step 5: Solve for x
    x = 1,145,877,551.60/39,126.74
  6. Step 6: Final answer
    x = 29,286.30

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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.