Home / 12,729.10-19,068.09-6,488.86

Finding the Fourth Proportional to 12,729.10, 19,068.09 and 6,488.86

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Solution

The fourth proportional to 12,729.10, 19,068.09 and 6,488.86 is: 9,720.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.10 : 19,068.09 = 6,488.86 : x
  2. Step 2: Convert to fraction form
    12,729.10/19,068.09 = 6,488.86/x
  3. Step 3: Cross multiply
    12,729.10x = 19,068.09 × 6,488.86
  4. Step 4: Simplify right side
    12,729.10x = 123,730,166.48
  5. Step 5: Solve for x
    x = 123,730,166.48/12,729.10
  6. Step 6: Final answer
    x = 9,720.26

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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.