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Finding the Fourth Proportional to 35,809.89, 53,715.38 and 12,436.89

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Solution

The fourth proportional to 35,809.89, 53,715.38 and 12,436.89 is: 18,655.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,809.89 : 53,715.38 = 12,436.89 : x
  2. Step 2: Convert to fraction form
    35,809.89/53,715.38 = 12,436.89/x
  3. Step 3: Cross multiply
    35,809.89x = 53,715.38 × 12,436.89
  4. Step 4: Simplify right side
    35,809.89x = 668,052,210.18
  5. Step 5: Solve for x
    x = 668,052,210.18/35,809.89
  6. Step 6: Final answer
    x = 18,655.52

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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.