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Finding the Fourth Proportional to 25,420.40, 35,081.04 and 15,346.87

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Solution

The fourth proportional to 25,420.40, 35,081.04 and 15,346.87 is: 21,179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,420.40 : 35,081.04 = 15,346.87 : x
  2. Step 2: Convert to fraction form
    25,420.40/35,081.04 = 15,346.87/x
  3. Step 3: Cross multiply
    25,420.40x = 35,081.04 × 15,346.87
  4. Step 4: Simplify right side
    25,420.40x = 538,383,984.94
  5. Step 5: Solve for x
    x = 538,383,984.94/25,420.40
  6. Step 6: Final answer
    x = 21,179.21

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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.