Home / 18,900.15-28,351.61-6,415.11

Finding the Fourth Proportional to 18,900.15, 28,351.61 and 6,415.11

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Solution

The fourth proportional to 18,900.15, 28,351.61 and 6,415.11 is: 9,623.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.15 : 28,351.61 = 6,415.11 : x
  2. Step 2: Convert to fraction form
    18,900.15/28,351.61 = 6,415.11/x
  3. Step 3: Cross multiply
    18,900.15x = 28,351.61 × 6,415.11
  4. Step 4: Simplify right side
    18,900.15x = 181,878,664.75
  5. Step 5: Solve for x
    x = 181,878,664.75/18,900.15
  6. Step 6: Final answer
    x = 9,623.13

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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.