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Finding the Fourth Proportional to 19,611.40, 29,417.04 and 7,924.48

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Solution

The fourth proportional to 19,611.40, 29,417.04 and 7,924.48 is: 11,886.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,611.40 : 29,417.04 = 7,924.48 : x
  2. Step 2: Convert to fraction form
    19,611.40/29,417.04 = 7,924.48/x
  3. Step 3: Cross multiply
    19,611.40x = 29,417.04 × 7,924.48
  4. Step 4: Simplify right side
    19,611.40x = 233,114,745.14
  5. Step 5: Solve for x
    x = 233,114,745.14/19,611.40
  6. Step 6: Final answer
    x = 11,886.70

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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.