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Finding the Fourth Proportional to 21,980.86, 32,980.85 and 10,881.22

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Solution

The fourth proportional to 21,980.86, 32,980.85 and 10,881.22 is: 16,326.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,980.86 : 32,980.85 = 10,881.22 : x
  2. Step 2: Convert to fraction form
    21,980.86/32,980.85 = 10,881.22/x
  3. Step 3: Cross multiply
    21,980.86x = 32,980.85 × 10,881.22
  4. Step 4: Simplify right side
    21,980.86x = 358,871,884.64
  5. Step 5: Solve for x
    x = 358,871,884.64/21,980.86
  6. Step 6: Final answer
    x = 16,326.56

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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.