Home / 20,690.52-28,502.74-15,376.12

Finding the Fourth Proportional to 20,690.52, 28,502.74 and 15,376.12

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Solution

The fourth proportional to 20,690.52, 28,502.74 and 15,376.12 is: 21,181.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.52 : 28,502.74 = 15,376.12 : x
  2. Step 2: Convert to fraction form
    20,690.52/28,502.74 = 15,376.12/x
  3. Step 3: Cross multiply
    20,690.52x = 28,502.74 × 15,376.12
  4. Step 4: Simplify right side
    20,690.52x = 438,261,550.57
  5. Step 5: Solve for x
    x = 438,261,550.57/20,690.52
  6. Step 6: Final answer
    x = 21,181.76

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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.