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Finding the Fourth Proportional to 12,490.51, 18,745 and 5,916.71

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Solution

The fourth proportional to 12,490.51, 18,745 and 5,916.71 is: 8,879.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.51 : 18,745 = 5,916.71 : x
  2. Step 2: Convert to fraction form
    12,490.51/18,745 = 5,916.71/x
  3. Step 3: Cross multiply
    12,490.51x = 18,745 × 5,916.71
  4. Step 4: Simplify right side
    12,490.51x = 110,908,635.23
  5. Step 5: Solve for x
    x = 110,908,635.23/12,490.51
  6. Step 6: Final answer
    x = 8,879.44

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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.