Home / 12,590.17-18,881.39-4,155.12

Finding the Fourth Proportional to 12,590.17, 18,881.39 and 4,155.12

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Solution

The fourth proportional to 12,590.17, 18,881.39 and 4,155.12 is: 6,231.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.17 : 18,881.39 = 4,155.12 : x
  2. Step 2: Convert to fraction form
    12,590.17/18,881.39 = 4,155.12/x
  3. Step 3: Cross multiply
    12,590.17x = 18,881.39 × 4,155.12
  4. Step 4: Simplify right side
    12,590.17x = 78,454,441.22
  5. Step 5: Solve for x
    x = 78,454,441.22/12,590.17
  6. Step 6: Final answer
    x = 6,231.40

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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.