Home / 18,285.40-25,190.62-15,077.80

Finding the Fourth Proportional to 18,285.40, 25,190.62 and 15,077.80

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Solution

The fourth proportional to 18,285.40, 25,190.62 and 15,077.80 is: 20,771.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.40 : 25,190.62 = 15,077.80 : x
  2. Step 2: Convert to fraction form
    18,285.40/25,190.62 = 15,077.80/x
  3. Step 3: Cross multiply
    18,285.40x = 25,190.62 × 15,077.80
  4. Step 4: Simplify right side
    18,285.40x = 379,819,130.24
  5. Step 5: Solve for x
    x = 379,819,130.24/18,285.40
  6. Step 6: Final answer
    x = 20,771.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.