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Finding the Fourth Proportional to 21,928.86, 32,885.53 and 7,135.02

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Solution

The fourth proportional to 21,928.86, 32,885.53 and 7,135.02 is: 10,700.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,928.86 : 32,885.53 = 7,135.02 : x
  2. Step 2: Convert to fraction form
    21,928.86/32,885.53 = 7,135.02/x
  3. Step 3: Cross multiply
    21,928.86x = 32,885.53 × 7,135.02
  4. Step 4: Simplify right side
    21,928.86x = 234,638,896.42
  5. Step 5: Solve for x
    x = 234,638,896.42/21,928.86
  6. Step 6: Final answer
    x = 10,700.00

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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.