Home / 18,870.42-28,305.62-8,470.02

Finding the Fourth Proportional to 18,870.42, 28,305.62 and 8,470.02

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Solution

The fourth proportional to 18,870.42, 28,305.62 and 8,470.02 is: 12,705.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.42 : 28,305.62 = 8,470.02 : x
  2. Step 2: Convert to fraction form
    18,870.42/28,305.62 = 8,470.02/x
  3. Step 3: Cross multiply
    18,870.42x = 28,305.62 × 8,470.02
  4. Step 4: Simplify right side
    18,870.42x = 239,749,047.16
  5. Step 5: Solve for x
    x = 239,749,047.16/18,870.42
  6. Step 6: Final answer
    x = 12,705.02

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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.