Home / 12,678.60-19,028.70-5,669.40

Finding the Fourth Proportional to 12,678.60, 19,028.70 and 5,669.40

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Solution

The fourth proportional to 12,678.60, 19,028.70 and 5,669.40 is: 8,508.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.60 : 19,028.70 = 5,669.40 : x
  2. Step 2: Convert to fraction form
    12,678.60/19,028.70 = 5,669.40/x
  3. Step 3: Cross multiply
    12,678.60x = 19,028.70 × 5,669.40
  4. Step 4: Simplify right side
    12,678.60x = 107,881,311.78
  5. Step 5: Solve for x
    x = 107,881,311.78/12,678.60
  6. Step 6: Final answer
    x = 8,508.93

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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.