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Finding the Fourth Proportional to 18,253.80, 25,190.19 and 9,870.30

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Solution

The fourth proportional to 18,253.80, 25,190.19 and 9,870.30 is: 13,620.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,253.80 : 25,190.19 = 9,870.30 : x
  2. Step 2: Convert to fraction form
    18,253.80/25,190.19 = 9,870.30/x
  3. Step 3: Cross multiply
    18,253.80x = 25,190.19 × 9,870.30
  4. Step 4: Simplify right side
    18,253.80x = 248,634,732.36
  5. Step 5: Solve for x
    x = 248,634,732.36/18,253.80
  6. Step 6: Final answer
    x = 13,620.98

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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.