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Finding the Fourth Proportional to 30,471.54, 45,688.84 and 19,928.82

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Solution

The fourth proportional to 30,471.54, 45,688.84 and 19,928.82 is: 29,881.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,471.54 : 45,688.84 = 19,928.82 : x
  2. Step 2: Convert to fraction form
    30,471.54/45,688.84 = 19,928.82/x
  3. Step 3: Cross multiply
    30,471.54x = 45,688.84 × 19,928.82
  4. Step 4: Simplify right side
    30,471.54x = 910,524,668.37
  5. Step 5: Solve for x
    x = 910,524,668.37/30,471.54
  6. Step 6: Final answer
    x = 29,881.15

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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.