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Finding the Fourth Proportional to 21,558.60, 32,337.90 and 20,100.60

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Solution

The fourth proportional to 21,558.60, 32,337.90 and 20,100.60 is: 30,150.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.60 : 32,337.90 = 20,100.60 : x
  2. Step 2: Convert to fraction form
    21,558.60/32,337.90 = 20,100.60/x
  3. Step 3: Cross multiply
    21,558.60x = 32,337.90 × 20,100.60
  4. Step 4: Simplify right side
    21,558.60x = 650,011,192.74
  5. Step 5: Solve for x
    x = 650,011,192.74/21,558.60
  6. Step 6: Final answer
    x = 30,150.90

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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.