Home / 39,805.09-54,931.91-21,901.05

Finding the Fourth Proportional to 39,805.09, 54,931.91 and 21,901.05

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Solution

The fourth proportional to 39,805.09, 54,931.91 and 21,901.05 is: 30,223.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,805.09 : 54,931.91 = 21,901.05 : x
  2. Step 2: Convert to fraction form
    39,805.09/54,931.91 = 21,901.05/x
  3. Step 3: Cross multiply
    39,805.09x = 54,931.91 × 21,901.05
  4. Step 4: Simplify right side
    39,805.09x = 1,203,066,398.00
  5. Step 5: Solve for x
    x = 1,203,066,398.00/39,805.09
  6. Step 6: Final answer
    x = 30,223.94

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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.