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Finding the Fourth Proportional to 39,240.80, 58,861.20 and 15,855.20

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Solution

The fourth proportional to 39,240.80, 58,861.20 and 15,855.20 is: 23,782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,240.80 : 58,861.20 = 15,855.20 : x
  2. Step 2: Convert to fraction form
    39,240.80/58,861.20 = 15,855.20/x
  3. Step 3: Cross multiply
    39,240.80x = 58,861.20 × 15,855.20
  4. Step 4: Simplify right side
    39,240.80x = 933,256,098.24
  5. Step 5: Solve for x
    x = 933,256,098.24/39,240.80
  6. Step 6: Final answer
    x = 23,782.80

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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.