Home / 18,858.39-28,287.65-6,378.51

Finding the Fourth Proportional to 18,858.39, 28,287.65 and 6,378.51

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Solution

The fourth proportional to 18,858.39, 28,287.65 and 6,378.51 is: 9,567.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.39 : 28,287.65 = 6,378.51 : x
  2. Step 2: Convert to fraction form
    18,858.39/28,287.65 = 6,378.51/x
  3. Step 3: Cross multiply
    18,858.39x = 28,287.65 × 6,378.51
  4. Step 4: Simplify right side
    18,858.39x = 180,433,058.40
  5. Step 5: Solve for x
    x = 180,433,058.40/18,858.39
  6. Step 6: Final answer
    x = 9,567.79

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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.