Home / 39,861.47-55,011.33-21,956.48

Finding the Fourth Proportional to 39,861.47, 55,011.33 and 21,956.48

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Solution

The fourth proportional to 39,861.47, 55,011.33 and 21,956.48 is: 30,301.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.47 : 55,011.33 = 21,956.48 : x
  2. Step 2: Convert to fraction form
    39,861.47/55,011.33 = 21,956.48/x
  3. Step 3: Cross multiply
    39,861.47x = 55,011.33 × 21,956.48
  4. Step 4: Simplify right side
    39,861.47x = 1,207,854,891.86
  5. Step 5: Solve for x
    x = 1,207,854,891.86/39,861.47
  6. Step 6: Final answer
    x = 30,301.32

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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.