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Finding the Fourth Proportional to 18,876.54, 28,312.77 and 8,878.32

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Solution

The fourth proportional to 18,876.54, 28,312.77 and 8,878.32 is: 13,316.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.54 : 28,312.77 = 8,878.32 : x
  2. Step 2: Convert to fraction form
    18,876.54/28,312.77 = 8,878.32/x
  3. Step 3: Cross multiply
    18,876.54x = 28,312.77 × 8,878.32
  4. Step 4: Simplify right side
    18,876.54x = 251,369,832.15
  5. Step 5: Solve for x
    x = 251,369,832.15/18,876.54
  6. Step 6: Final answer
    x = 13,316.52

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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.