Home / 12,579.18-18,874.44-5,188.74

Finding the Fourth Proportional to 12,579.18, 18,874.44 and 5,188.74

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Solution

The fourth proportional to 12,579.18, 18,874.44 and 5,188.74 is: 7,785.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.18 : 18,874.44 = 5,188.74 : x
  2. Step 2: Convert to fraction form
    12,579.18/18,874.44 = 5,188.74/x
  3. Step 3: Cross multiply
    12,579.18x = 18,874.44 × 5,188.74
  4. Step 4: Simplify right side
    12,579.18x = 97,934,561.81
  5. Step 5: Solve for x
    x = 97,934,561.81/12,579.18
  6. Step 6: Final answer
    x = 7,785.45

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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.