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Finding the Fourth Proportional to 18,300.40, 25,235.56 and 15,656.56

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Solution

The fourth proportional to 18,300.40, 25,235.56 and 15,656.56 is: 21,589.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.40 : 25,235.56 = 15,656.56 : x
  2. Step 2: Convert to fraction form
    18,300.40/25,235.56 = 15,656.56/x
  3. Step 3: Cross multiply
    18,300.40x = 25,235.56 × 15,656.56
  4. Step 4: Simplify right side
    18,300.40x = 395,102,059.27
  5. Step 5: Solve for x
    x = 395,102,059.27/18,300.40
  6. Step 6: Final answer
    x = 21,589.80

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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.