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Finding the Fourth Proportional to 15,463.72, 21,339.93 and 8,749.21

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Solution

The fourth proportional to 15,463.72, 21,339.93 and 8,749.21 is: 12,073.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,463.72 : 21,339.93 = 8,749.21 : x
  2. Step 2: Convert to fraction form
    15,463.72/21,339.93 = 8,749.21/x
  3. Step 3: Cross multiply
    15,463.72x = 21,339.93 × 8,749.21
  4. Step 4: Simplify right side
    15,463.72x = 186,707,528.96
  5. Step 5: Solve for x
    x = 186,707,528.96/15,463.72
  6. Step 6: Final answer
    x = 12,073.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.