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Finding the Fourth Proportional to 25,396.69, 35,064.75 and 15,840.31

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Solution

The fourth proportional to 25,396.69, 35,064.75 and 15,840.31 is: 21,870.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,396.69 : 35,064.75 = 15,840.31 : x
  2. Step 2: Convert to fraction form
    25,396.69/35,064.75 = 15,840.31/x
  3. Step 3: Cross multiply
    25,396.69x = 35,064.75 × 15,840.31
  4. Step 4: Simplify right side
    25,396.69x = 555,436,510.07
  5. Step 5: Solve for x
    x = 555,436,510.07/25,396.69
  6. Step 6: Final answer
    x = 21,870.43

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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.