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Finding the Fourth Proportional to 19,175.40, 28,792.80 and 10,427.40

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Solution

The fourth proportional to 19,175.40, 28,792.80 and 10,427.40 is: 15,657.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,175.40 : 28,792.80 = 10,427.40 : x
  2. Step 2: Convert to fraction form
    19,175.40/28,792.80 = 10,427.40/x
  3. Step 3: Cross multiply
    19,175.40x = 28,792.80 × 10,427.40
  4. Step 4: Simplify right side
    19,175.40x = 300,234,042.72
  5. Step 5: Solve for x
    x = 300,234,042.72/19,175.40
  6. Step 6: Final answer
    x = 15,657.25

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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.