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Finding the Fourth Proportional to 19,289.61, 28,950.71 and 7,611.03

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Solution

The fourth proportional to 19,289.61, 28,950.71 and 7,611.03 is: 11,422.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,289.61 : 28,950.71 = 7,611.03 : x
  2. Step 2: Convert to fraction form
    19,289.61/28,950.71 = 7,611.03/x
  3. Step 3: Cross multiply
    19,289.61x = 28,950.71 × 7,611.03
  4. Step 4: Simplify right side
    19,289.61x = 220,344,684.28
  5. Step 5: Solve for x
    x = 220,344,684.28/19,289.61
  6. Step 6: Final answer
    x = 11,422.97

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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.