Home / 12,420.56-18,631.71-4,106.43

Finding the Fourth Proportional to 12,420.56, 18,631.71 and 4,106.43

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Solution

The fourth proportional to 12,420.56, 18,631.71 and 4,106.43 is: 6,159.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.56 : 18,631.71 = 4,106.43 : x
  2. Step 2: Convert to fraction form
    12,420.56/18,631.71 = 4,106.43/x
  3. Step 3: Cross multiply
    12,420.56x = 18,631.71 × 4,106.43
  4. Step 4: Simplify right side
    12,420.56x = 76,509,807.12
  5. Step 5: Solve for x
    x = 76,509,807.12/12,420.56
  6. Step 6: Final answer
    x = 6,159.93

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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.