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Finding the Fourth Proportional to 15,463.85, 21,339.99 and 8,749.42

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Solution

The fourth proportional to 15,463.85, 21,339.99 and 8,749.42 is: 12,074.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,463.85 : 21,339.99 = 8,749.42 : x
  2. Step 2: Convert to fraction form
    15,463.85/21,339.99 = 8,749.42/x
  3. Step 3: Cross multiply
    15,463.85x = 21,339.99 × 8,749.42
  4. Step 4: Simplify right side
    15,463.85x = 186,712,535.31
  5. Step 5: Solve for x
    x = 186,712,535.31/15,463.85
  6. Step 6: Final answer
    x = 12,074.13

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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.