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Finding the Fourth Proportional to 25,977.60, 39,004.80 and 20,140.80

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Solution

The fourth proportional to 25,977.60, 39,004.80 and 20,140.80 is: 30,240.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,977.60 : 39,004.80 = 20,140.80 : x
  2. Step 2: Convert to fraction form
    25,977.60/39,004.80 = 20,140.80/x
  3. Step 3: Cross multiply
    25,977.60x = 39,004.80 × 20,140.80
  4. Step 4: Simplify right side
    25,977.60x = 785,587,875.84
  5. Step 5: Solve for x
    x = 785,587,875.84/25,977.60
  6. Step 6: Final answer
    x = 30,240.97

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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.