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Finding the Fourth Proportional to 18,985.29, 28,480.65 and 5,838.77

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Solution

The fourth proportional to 18,985.29, 28,480.65 and 5,838.77 is: 8,758.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.29 : 28,480.65 = 5,838.77 : x
  2. Step 2: Convert to fraction form
    18,985.29/28,480.65 = 5,838.77/x
  3. Step 3: Cross multiply
    18,985.29x = 28,480.65 × 5,838.77
  4. Step 4: Simplify right side
    18,985.29x = 166,291,822.40
  5. Step 5: Solve for x
    x = 166,291,822.40/18,985.29
  6. Step 6: Final answer
    x = 8,758.98

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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.