Home / 12,930.80-19,368.52-7,381.20

Finding the Fourth Proportional to 12,930.80, 19,368.52 and 7,381.20

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Solution

The fourth proportional to 12,930.80, 19,368.52 and 7,381.20 is: 11,056.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.80 : 19,368.52 = 7,381.20 : x
  2. Step 2: Convert to fraction form
    12,930.80/19,368.52 = 7,381.20/x
  3. Step 3: Cross multiply
    12,930.80x = 19,368.52 × 7,381.20
  4. Step 4: Simplify right side
    12,930.80x = 142,962,919.82
  5. Step 5: Solve for x
    x = 142,962,919.82/12,930.80
  6. Step 6: Final answer
    x = 11,056.00

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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.