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Finding the Fourth Proportional to 30,459.92, 42,040.14 and 18,362.58

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Solution

The fourth proportional to 30,459.92, 42,040.14 and 18,362.58 is: 25,343.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,459.92 : 42,040.14 = 18,362.58 : x
  2. Step 2: Convert to fraction form
    30,459.92/42,040.14 = 18,362.58/x
  3. Step 3: Cross multiply
    30,459.92x = 42,040.14 × 18,362.58
  4. Step 4: Simplify right side
    30,459.92x = 771,965,433.96
  5. Step 5: Solve for x
    x = 771,965,433.96/30,459.92
  6. Step 6: Final answer
    x = 25,343.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.