Home / 18,870.86-28,304.65-6,390.61

Finding the Fourth Proportional to 18,870.86, 28,304.65 and 6,390.61

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Solution

The fourth proportional to 18,870.86, 28,304.65 and 6,390.61 is: 9,585.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.86 : 28,304.65 = 6,390.61 : x
  2. Step 2: Convert to fraction form
    18,870.86/28,304.65 = 6,390.61/x
  3. Step 3: Cross multiply
    18,870.86x = 28,304.65 × 6,390.61
  4. Step 4: Simplify right side
    18,870.86x = 180,883,979.34
  5. Step 5: Solve for x
    x = 180,883,979.34/18,870.86
  6. Step 6: Final answer
    x = 9,585.36

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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.