Home / 12,187.16-18,280.80-4,390.40

Finding the Fourth Proportional to 12,187.16, 18,280.80 and 4,390.40

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Solution

The fourth proportional to 12,187.16, 18,280.80 and 4,390.40 is: 6,585.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.16 : 18,280.80 = 4,390.40 : x
  2. Step 2: Convert to fraction form
    12,187.16/18,280.80 = 4,390.40/x
  3. Step 3: Cross multiply
    12,187.16x = 18,280.80 × 4,390.40
  4. Step 4: Simplify right side
    12,187.16x = 80,260,024.32
  5. Step 5: Solve for x
    x = 80,260,024.32/12,187.16
  6. Step 6: Final answer
    x = 6,585.62

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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.