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Finding the Fourth Proportional to 35,490.78, 53,236.17 and 19,919.34

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Solution

The fourth proportional to 35,490.78, 53,236.17 and 19,919.34 is: 29,879.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,490.78 : 53,236.17 = 19,919.34 : x
  2. Step 2: Convert to fraction form
    35,490.78/53,236.17 = 19,919.34/x
  3. Step 3: Cross multiply
    35,490.78x = 53,236.17 × 19,919.34
  4. Step 4: Simplify right side
    35,490.78x = 1,060,429,370.53
  5. Step 5: Solve for x
    x = 1,060,429,370.53/35,490.78
  6. Step 6: Final answer
    x = 29,879.01

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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.