Home / 18,870.15-28,305.27-6,390.30

Finding the Fourth Proportional to 18,870.15, 28,305.27 and 6,390.30

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Solution

The fourth proportional to 18,870.15, 28,305.27 and 6,390.30 is: 9,585.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.15 : 28,305.27 = 6,390.30 : x
  2. Step 2: Convert to fraction form
    18,870.15/28,305.27 = 6,390.30/x
  3. Step 3: Cross multiply
    18,870.15x = 28,305.27 × 6,390.30
  4. Step 4: Simplify right side
    18,870.15x = 180,879,166.88
  5. Step 5: Solve for x
    x = 180,879,166.88/18,870.15
  6. Step 6: Final answer
    x = 9,585.47

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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.