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Finding the Fourth Proportional to 25,706.86, 35,479.49 and 15,638.46

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Solution

The fourth proportional to 25,706.86, 35,479.49 and 15,638.46 is: 21,583.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,706.86 : 35,479.49 = 15,638.46 : x
  2. Step 2: Convert to fraction form
    25,706.86/35,479.49 = 15,638.46/x
  3. Step 3: Cross multiply
    25,706.86x = 35,479.49 × 15,638.46
  4. Step 4: Simplify right side
    25,706.86x = 554,844,585.19
  5. Step 5: Solve for x
    x = 554,844,585.19/25,706.86
  6. Step 6: Final answer
    x = 21,583.52

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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.