Home / 12,890.40-19,332.90-6,321.30

Finding the Fourth Proportional to 12,890.40, 19,332.90 and 6,321.30

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Solution

The fourth proportional to 12,890.40, 19,332.90 and 6,321.30 is: 9,480.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.40 : 19,332.90 = 6,321.30 : x
  2. Step 2: Convert to fraction form
    12,890.40/19,332.90 = 6,321.30/x
  3. Step 3: Cross multiply
    12,890.40x = 19,332.90 × 6,321.30
  4. Step 4: Simplify right side
    12,890.40x = 122,209,060.77
  5. Step 5: Solve for x
    x = 122,209,060.77/12,890.40
  6. Step 6: Final answer
    x = 9,480.63

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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.