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Finding the Fourth Proportional to 30,459.56, 45,689.16 and 11,487.74

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Solution

The fourth proportional to 30,459.56, 45,689.16 and 11,487.74 is: 17,231.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,459.56 : 45,689.16 = 11,487.74 : x
  2. Step 2: Convert to fraction form
    30,459.56/45,689.16 = 11,487.74/x
  3. Step 3: Cross multiply
    30,459.56x = 45,689.16 × 11,487.74
  4. Step 4: Simplify right side
    30,459.56x = 524,865,190.90
  5. Step 5: Solve for x
    x = 524,865,190.90/30,459.56
  6. Step 6: Final answer
    x = 17,231.54

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1.5x scale

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.