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Finding the Fourth Proportional to 39,970.52, 55,161.78 and 22,980.20

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Solution

The fourth proportional to 39,970.52, 55,161.78 and 22,980.20 is: 31,714.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,970.52 : 55,161.78 = 22,980.20 : x
  2. Step 2: Convert to fraction form
    39,970.52/55,161.78 = 22,980.20/x
  3. Step 3: Cross multiply
    39,970.52x = 55,161.78 × 22,980.20
  4. Step 4: Simplify right side
    39,970.52x = 1,267,628,736.76
  5. Step 5: Solve for x
    x = 1,267,628,736.76/39,970.52
  6. Step 6: Final answer
    x = 31,714.09

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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.