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Finding the Fourth Proportional to 39,720.60, 54,819.29 and 22,953.60

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Solution

The fourth proportional to 39,720.60, 54,819.29 and 22,953.60 is: 31,678.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.60 : 54,819.29 = 22,953.60 : x
  2. Step 2: Convert to fraction form
    39,720.60/54,819.29 = 22,953.60/x
  3. Step 3: Cross multiply
    39,720.60x = 54,819.29 × 22,953.60
  4. Step 4: Simplify right side
    39,720.60x = 1,258,299,666.08
  5. Step 5: Solve for x
    x = 1,258,299,666.08/39,720.60
  6. Step 6: Final answer
    x = 31,678.77

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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.