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Finding the Fourth Proportional to 25,809.64, 35,619.62 and 15,738.64

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Solution

The fourth proportional to 25,809.64, 35,619.62 and 15,738.64 is: 21,720.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,809.64 : 35,619.62 = 15,738.64 : x
  2. Step 2: Convert to fraction form
    25,809.64/35,619.62 = 15,738.64/x
  3. Step 3: Cross multiply
    25,809.64x = 35,619.62 × 15,738.64
  4. Step 4: Simplify right side
    25,809.64x = 560,604,376.12
  5. Step 5: Solve for x
    x = 560,604,376.12/25,809.64
  6. Step 6: Final answer
    x = 21,720.74

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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.