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Finding the Fourth Proportional to 30,491.92, 45,553.10 and 19,309.06

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Solution

The fourth proportional to 30,491.92, 45,553.10 and 19,309.06 is: 28,846.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,491.92 : 45,553.10 = 19,309.06 : x
  2. Step 2: Convert to fraction form
    30,491.92/45,553.10 = 19,309.06/x
  3. Step 3: Cross multiply
    30,491.92x = 45,553.10 × 19,309.06
  4. Step 4: Simplify right side
    30,491.92x = 879,587,541.09
  5. Step 5: Solve for x
    x = 879,587,541.09/30,491.92
  6. Step 6: Final answer
    x = 28,846.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.