Home / 39,723.49-54,819.39-21,820.15

Finding the Fourth Proportional to 39,723.49, 54,819.39 and 21,820.15

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Solution

The fourth proportional to 39,723.49, 54,819.39 and 21,820.15 is: 30,112.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,723.49 : 54,819.39 = 21,820.15 : x
  2. Step 2: Convert to fraction form
    39,723.49/54,819.39 = 21,820.15/x
  3. Step 3: Cross multiply
    39,723.49x = 54,819.39 × 21,820.15
  4. Step 4: Simplify right side
    39,723.49x = 1,196,167,312.71
  5. Step 5: Solve for x
    x = 1,196,167,312.71/39,723.49
  6. Step 6: Final answer
    x = 30,112.34

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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.