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Finding the Fourth Proportional to 21,836.63, 32,754.95 and 5,420.63

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Solution

The fourth proportional to 21,836.63, 32,754.95 and 5,420.63 is: 8,130.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.63 : 32,754.95 = 5,420.63 : x
  2. Step 2: Convert to fraction form
    21,836.63/32,754.95 = 5,420.63/x
  3. Step 3: Cross multiply
    21,836.63x = 32,754.95 × 5,420.63
  4. Step 4: Simplify right side
    21,836.63x = 177,552,273.74
  5. Step 5: Solve for x
    x = 177,552,273.74/21,836.63
  6. Step 6: Final answer
    x = 8,130.94

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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.