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Finding the Fourth Proportional to 25,416, 38,148.30 and 10,620.99

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Solution

The fourth proportional to 25,416, 38,148.30 and 10,620.99 is: 15,941.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,416 : 38,148.30 = 10,620.99 : x
  2. Step 2: Convert to fraction form
    25,416/38,148.30 = 10,620.99/x
  3. Step 3: Cross multiply
    25,416x = 38,148.30 × 10,620.99
  4. Step 4: Simplify right side
    25,416x = 405,172,712.82
  5. Step 5: Solve for x
    x = 405,172,712.82/25,416
  6. Step 6: Final answer
    x = 15,941.64

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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.