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Finding the Fourth Proportional to 25,699.78, 35,465.70 and 14,521.78

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Solution

The fourth proportional to 25,699.78, 35,465.70 and 14,521.78 is: 20,040.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,699.78 : 35,465.70 = 14,521.78 : x
  2. Step 2: Convert to fraction form
    25,699.78/35,465.70 = 14,521.78/x
  3. Step 3: Cross multiply
    25,699.78x = 35,465.70 × 14,521.78
  4. Step 4: Simplify right side
    25,699.78x = 515,025,137.28
  5. Step 5: Solve for x
    x = 515,025,137.28/25,699.78
  6. Step 6: Final answer
    x = 20,040.06

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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.