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Finding the Fourth Proportional to 25,661.63, 35,416.13 and 15,591.71

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Solution

The fourth proportional to 25,661.63, 35,416.13 and 15,591.71 is: 21,518.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,661.63 : 35,416.13 = 15,591.71 : x
  2. Step 2: Convert to fraction form
    25,661.63/35,416.13 = 15,591.71/x
  3. Step 3: Cross multiply
    25,661.63x = 35,416.13 × 15,591.71
  4. Step 4: Simplify right side
    25,661.63x = 552,197,950.32
  5. Step 5: Solve for x
    x = 552,197,950.32/25,661.63
  6. Step 6: Final answer
    x = 21,518.43

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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.