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Finding the Fourth Proportional to 35,487.45, 53,185.95 and 18,855.45

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Solution

The fourth proportional to 35,487.45, 53,185.95 and 18,855.45 is: 28,259.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,487.45 : 53,185.95 = 18,855.45 : x
  2. Step 2: Convert to fraction form
    35,487.45/53,185.95 = 18,855.45/x
  3. Step 3: Cross multiply
    35,487.45x = 53,185.95 × 18,855.45
  4. Step 4: Simplify right side
    35,487.45x = 1,002,845,020.93
  5. Step 5: Solve for x
    x = 1,002,845,020.93/35,487.45
  6. Step 6: Final answer
    x = 28,259.15

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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.