Home / 39,724.71-54,817.40-21,820.47

Finding the Fourth Proportional to 39,724.71, 54,817.40 and 21,820.47

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Solution

The fourth proportional to 39,724.71, 54,817.40 and 21,820.47 is: 30,110.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,724.71 : 54,817.40 = 21,820.47 : x
  2. Step 2: Convert to fraction form
    39,724.71/54,817.40 = 21,820.47/x
  3. Step 3: Cross multiply
    39,724.71x = 54,817.40 × 21,820.47
  4. Step 4: Simplify right side
    39,724.71x = 1,196,141,323.08
  5. Step 5: Solve for x
    x = 1,196,141,323.08/39,724.71
  6. Step 6: Final answer
    x = 30,110.76

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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.