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Finding the Fourth Proportional to 30,486.65, 45,718.47 and 10,490.48

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Solution

The fourth proportional to 30,486.65, 45,718.47 and 10,490.48 is: 15,731.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,486.65 : 45,718.47 = 10,490.48 : x
  2. Step 2: Convert to fraction form
    30,486.65/45,718.47 = 10,490.48/x
  3. Step 3: Cross multiply
    30,486.65x = 45,718.47 × 10,490.48
  4. Step 4: Simplify right side
    30,486.65x = 479,608,466.57
  5. Step 5: Solve for x
    x = 479,608,466.57/30,486.65
  6. Step 6: Final answer
    x = 15,731.76

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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.