Home / 12,239.04-18,360.96-5,318.40

Finding the Fourth Proportional to 12,239.04, 18,360.96 and 5,318.40

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Solution

The fourth proportional to 12,239.04, 18,360.96 and 5,318.40 is: 7,978.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.04 : 18,360.96 = 5,318.40 : x
  2. Step 2: Convert to fraction form
    12,239.04/18,360.96 = 5,318.40/x
  3. Step 3: Cross multiply
    12,239.04x = 18,360.96 × 5,318.40
  4. Step 4: Simplify right side
    12,239.04x = 97,650,929.66
  5. Step 5: Solve for x
    x = 97,650,929.66/12,239.04
  6. Step 6: Final answer
    x = 7,978.64

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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.