Home / 39,867.81-55,016.28-21,962.76

Finding the Fourth Proportional to 39,867.81, 55,016.28 and 21,962.76

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Solution

The fourth proportional to 39,867.81, 55,016.28 and 21,962.76 is: 30,307.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,867.81 : 55,016.28 = 21,962.76 : x
  2. Step 2: Convert to fraction form
    39,867.81/55,016.28 = 21,962.76/x
  3. Step 3: Cross multiply
    39,867.81x = 55,016.28 × 21,962.76
  4. Step 4: Simplify right side
    39,867.81x = 1,208,309,353.73
  5. Step 5: Solve for x
    x = 1,208,309,353.73/39,867.81
  6. Step 6: Final answer
    x = 30,307.89

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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.