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Finding the Fourth Proportional to 25,215.60, 37,812.60 and 10,419.60

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Solution

The fourth proportional to 25,215.60, 37,812.60 and 10,419.60 is: 15,624.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,215.60 : 37,812.60 = 10,419.60 : x
  2. Step 2: Convert to fraction form
    25,215.60/37,812.60 = 10,419.60/x
  3. Step 3: Cross multiply
    25,215.60x = 37,812.60 × 10,419.60
  4. Step 4: Simplify right side
    25,215.60x = 393,992,166.96
  5. Step 5: Solve for x
    x = 393,992,166.96/25,215.60
  6. Step 6: Final answer
    x = 15,624.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.