Home / 15,690.72-21,653.92-9,403.04

Finding the Fourth Proportional to 15,690.72, 21,653.92 and 9,403.04

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Solution

The fourth proportional to 15,690.72, 21,653.92 and 9,403.04 is: 12,976.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.72 : 21,653.92 = 9,403.04 : x
  2. Step 2: Convert to fraction form
    15,690.72/21,653.92 = 9,403.04/x
  3. Step 3: Cross multiply
    15,690.72x = 21,653.92 × 9,403.04
  4. Step 4: Simplify right side
    15,690.72x = 203,612,675.92
  5. Step 5: Solve for x
    x = 203,612,675.92/15,690.72
  6. Step 6: Final answer
    x = 12,976.63

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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.