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Finding the Fourth Proportional to 25,379.61, 35,019.72 and 15,941.49

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Solution

The fourth proportional to 25,379.61, 35,019.72 and 15,941.49 is: 21,996.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,379.61 : 35,019.72 = 15,941.49 : x
  2. Step 2: Convert to fraction form
    25,379.61/35,019.72 = 15,941.49/x
  3. Step 3: Cross multiply
    25,379.61x = 35,019.72 × 15,941.49
  4. Step 4: Simplify right side
    25,379.61x = 558,266,516.18
  5. Step 5: Solve for x
    x = 558,266,516.18/25,379.61
  6. Step 6: Final answer
    x = 21,996.65

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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.