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Finding the Fourth Proportional to 21,499.80, 32,270.58 and 20,316.48

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Solution

The fourth proportional to 21,499.80, 32,270.58 and 20,316.48 is: 30,494.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,499.80 : 32,270.58 = 20,316.48 : x
  2. Step 2: Convert to fraction form
    21,499.80/32,270.58 = 20,316.48/x
  3. Step 3: Cross multiply
    21,499.80x = 32,270.58 × 20,316.48
  4. Step 4: Simplify right side
    21,499.80x = 655,624,593.16
  5. Step 5: Solve for x
    x = 655,624,593.16/21,499.80
  6. Step 6: Final answer
    x = 30,494.45

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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.