Home / 19,977.40-29,981.60-7,508.78

Finding the Fourth Proportional to 19,977.40, 29,981.60 and 7,508.78

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Solution

The fourth proportional to 19,977.40, 29,981.60 and 7,508.78 is: 11,269.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.40 : 29,981.60 = 7,508.78 : x
  2. Step 2: Convert to fraction form
    19,977.40/29,981.60 = 7,508.78/x
  3. Step 3: Cross multiply
    19,977.40x = 29,981.60 × 7,508.78
  4. Step 4: Simplify right side
    19,977.40x = 225,125,238.45
  5. Step 5: Solve for x
    x = 225,125,238.45/19,977.40
  6. Step 6: Final answer
    x = 11,269.00

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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.