Home / 15,805.32-21,814.75-10,781.56

Finding the Fourth Proportional to 15,805.32, 21,814.75 and 10,781.56

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Solution

The fourth proportional to 15,805.32, 21,814.75 and 10,781.56 is: 14,880.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.32 : 21,814.75 = 10,781.56 : x
  2. Step 2: Convert to fraction form
    15,805.32/21,814.75 = 10,781.56/x
  3. Step 3: Cross multiply
    15,805.32x = 21,814.75 × 10,781.56
  4. Step 4: Simplify right side
    15,805.32x = 235,197,036.01
  5. Step 5: Solve for x
    x = 235,197,036.01/15,805.32
  6. Step 6: Final answer
    x = 14,880.88

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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.