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Finding the Fourth Proportional to 12,878.16, 19,328.16 and 5,092.44

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Solution

The fourth proportional to 12,878.16, 19,328.16 and 5,092.44 is: 7,642.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.16 : 19,328.16 = 5,092.44 : x
  2. Step 2: Convert to fraction form
    12,878.16/19,328.16 = 5,092.44/x
  3. Step 3: Cross multiply
    12,878.16x = 19,328.16 × 5,092.44
  4. Step 4: Simplify right side
    12,878.16x = 98,427,495.11
  5. Step 5: Solve for x
    x = 98,427,495.11/12,878.16
  6. Step 6: Final answer
    x = 7,642.98

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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.