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Finding the Fourth Proportional to 39,369, 59,070.90 and 20,644.56

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Solution

The fourth proportional to 39,369, 59,070.90 and 20,644.56 is: 30,975.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,369 : 59,070.90 = 20,644.56 : x
  2. Step 2: Convert to fraction form
    39,369/59,070.90 = 20,644.56/x
  3. Step 3: Cross multiply
    39,369x = 59,070.90 × 20,644.56
  4. Step 4: Simplify right side
    39,369x = 1,219,492,739.30
  5. Step 5: Solve for x
    x = 1,219,492,739.30/39,369
  6. Step 6: Final answer
    x = 30,975.96

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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.