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Finding the Fourth Proportional to 18,703.64, 28,058.38 and 5,557.32

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Solution

The fourth proportional to 18,703.64, 28,058.38 and 5,557.32 is: 8,336.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.64 : 28,058.38 = 5,557.32 : x
  2. Step 2: Convert to fraction form
    18,703.64/28,058.38 = 5,557.32/x
  3. Step 3: Cross multiply
    18,703.64x = 28,058.38 × 5,557.32
  4. Step 4: Simplify right side
    18,703.64x = 155,929,396.34
  5. Step 5: Solve for x
    x = 155,929,396.34/18,703.64
  6. Step 6: Final answer
    x = 8,336.85

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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.