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Finding the Fourth Proportional to 30,410.61, 45,621.59 and 11,689.89

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Solution

The fourth proportional to 30,410.61, 45,621.59 and 11,689.89 is: 17,537.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,410.61 : 45,621.59 = 11,689.89 : x
  2. Step 2: Convert to fraction form
    30,410.61/45,621.59 = 11,689.89/x
  3. Step 3: Cross multiply
    30,410.61x = 45,621.59 × 11,689.89
  4. Step 4: Simplify right side
    30,410.61x = 533,311,310.28
  5. Step 5: Solve for x
    x = 533,311,310.28/30,410.61
  6. Step 6: Final answer
    x = 17,537.01

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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.