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Finding the Fourth Proportional to 19,977.58, 29,958.58 and 7,490.80

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Solution

The fourth proportional to 19,977.58, 29,958.58 and 7,490.80 is: 11,233.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.58 : 29,958.58 = 7,490.80 : x
  2. Step 2: Convert to fraction form
    19,977.58/29,958.58 = 7,490.80/x
  3. Step 3: Cross multiply
    19,977.58x = 29,958.58 × 7,490.80
  4. Step 4: Simplify right side
    19,977.58x = 224,413,731.06
  5. Step 5: Solve for x
    x = 224,413,731.06/19,977.58
  6. Step 6: Final answer
    x = 11,233.28

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1.5x scale

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.