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Finding the Fourth Proportional to 35,861.78, 53,799.96 and 12,490.04

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Solution

The fourth proportional to 35,861.78, 53,799.96 and 12,490.04 is: 18,737.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,861.78 : 53,799.96 = 12,490.04 : x
  2. Step 2: Convert to fraction form
    35,861.78/53,799.96 = 12,490.04/x
  3. Step 3: Cross multiply
    35,861.78x = 53,799.96 × 12,490.04
  4. Step 4: Simplify right side
    35,861.78x = 671,963,652.40
  5. Step 5: Solve for x
    x = 671,963,652.40/35,861.78
  6. Step 6: Final answer
    x = 18,737.60

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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.