Home / 12,278.64-18,420.52-4,070

Finding the Fourth Proportional to 12,278.64, 18,420.52 and 4,070

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Solution

The fourth proportional to 12,278.64, 18,420.52 and 4,070 is: 6,105.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.64 : 18,420.52 = 4,070 : x
  2. Step 2: Convert to fraction form
    12,278.64/18,420.52 = 4,070/x
  3. Step 3: Cross multiply
    12,278.64x = 18,420.52 × 4,070
  4. Step 4: Simplify right side
    12,278.64x = 74,971,516.40
  5. Step 5: Solve for x
    x = 74,971,516.40/12,278.64
  6. Step 6: Final answer
    x = 6,105.85

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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.