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Finding the Fourth Proportional to 19,145.20, 28,706.04 and 7,444.78

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Solution

The fourth proportional to 19,145.20, 28,706.04 and 7,444.78 is: 11,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.20 : 28,706.04 = 7,444.78 : x
  2. Step 2: Convert to fraction form
    19,145.20/28,706.04 = 7,444.78/x
  3. Step 3: Cross multiply
    19,145.20x = 28,706.04 × 7,444.78
  4. Step 4: Simplify right side
    19,145.20x = 213,710,152.47
  5. Step 5: Solve for x
    x = 213,710,152.47/19,145.20
  6. Step 6: Final answer
    x = 11,162.60

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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.