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Finding the Fourth Proportional to 25,085.60, 37,660.80 and 20,160.80

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Solution

The fourth proportional to 25,085.60, 37,660.80 and 20,160.80 is: 30,267.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,085.60 : 37,660.80 = 20,160.80 : x
  2. Step 2: Convert to fraction form
    25,085.60/37,660.80 = 20,160.80/x
  3. Step 3: Cross multiply
    25,085.60x = 37,660.80 × 20,160.80
  4. Step 4: Simplify right side
    25,085.60x = 759,271,856.64
  5. Step 5: Solve for x
    x = 759,271,856.64/25,085.60
  6. Step 6: Final answer
    x = 30,267.24

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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.