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Finding the Fourth Proportional to 18,710.88, 25,820.62 and 10,212.72

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Solution

The fourth proportional to 18,710.88, 25,820.62 and 10,212.72 is: 14,093.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.88 : 25,820.62 = 10,212.72 : x
  2. Step 2: Convert to fraction form
    18,710.88/25,820.62 = 10,212.72/x
  3. Step 3: Cross multiply
    18,710.88x = 25,820.62 × 10,212.72
  4. Step 4: Simplify right side
    18,710.88x = 263,698,762.29
  5. Step 5: Solve for x
    x = 263,698,762.29/18,710.88
  6. Step 6: Final answer
    x = 14,093.34

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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.