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Finding the Fourth Proportional to 38,486.70, 57,730.05 and 21,840.30

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Solution

The fourth proportional to 38,486.70, 57,730.05 and 21,840.30 is: 32,760.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,486.70 : 57,730.05 = 21,840.30 : x
  2. Step 2: Convert to fraction form
    38,486.70/57,730.05 = 21,840.30/x
  3. Step 3: Cross multiply
    38,486.70x = 57,730.05 × 21,840.30
  4. Step 4: Simplify right side
    38,486.70x = 1,260,841,611.02
  5. Step 5: Solve for x
    x = 1,260,841,611.02/38,486.70
  6. Step 6: Final answer
    x = 32,760.45

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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.