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Finding the Fourth Proportional to 53,575.80, 80,358.06 and 21,989.20

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Solution

The fourth proportional to 53,575.80, 80,358.06 and 21,989.20 is: 32,981.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,575.80 : 80,358.06 = 21,989.20 : x
  2. Step 2: Convert to fraction form
    53,575.80/80,358.06 = 21,989.20/x
  3. Step 3: Cross multiply
    53,575.80x = 80,358.06 × 21,989.20
  4. Step 4: Simplify right side
    53,575.80x = 1,767,009,169.60
  5. Step 5: Solve for x
    x = 1,767,009,169.60/53,575.80
  6. Step 6: Final answer
    x = 32,981.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.