Home / 18,870.23-28,309.35-6,389.66

Finding the Fourth Proportional to 18,870.23, 28,309.35 and 6,389.66

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Solution

The fourth proportional to 18,870.23, 28,309.35 and 6,389.66 is: 9,585.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.23 : 28,309.35 = 6,389.66 : x
  2. Step 2: Convert to fraction form
    18,870.23/28,309.35 = 6,389.66/x
  3. Step 3: Cross multiply
    18,870.23x = 28,309.35 × 6,389.66
  4. Step 4: Simplify right side
    18,870.23x = 180,887,121.32
  5. Step 5: Solve for x
    x = 180,887,121.32/18,870.23
  6. Step 6: Final answer
    x = 9,585.85

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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.