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Finding the Fourth Proportional to 30,679.47, 45,990.05 and 19,554.93

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Solution

The fourth proportional to 30,679.47, 45,990.05 and 19,554.93 is: 29,313.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,679.47 : 45,990.05 = 19,554.93 : x
  2. Step 2: Convert to fraction form
    30,679.47/45,990.05 = 19,554.93/x
  3. Step 3: Cross multiply
    30,679.47x = 45,990.05 × 19,554.93
  4. Step 4: Simplify right side
    30,679.47x = 899,332,110.67
  5. Step 5: Solve for x
    x = 899,332,110.67/30,679.47
  6. Step 6: Final answer
    x = 29,313.81

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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.