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Finding the Fourth Proportional to 15,175.98, 20,953.63 and 12,664.57

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Solution

The fourth proportional to 15,175.98, 20,953.63 and 12,664.57 is: 17,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,175.98 : 20,953.63 = 12,664.57 : x
  2. Step 2: Convert to fraction form
    15,175.98/20,953.63 = 12,664.57/x
  3. Step 3: Cross multiply
    15,175.98x = 20,953.63 × 12,664.57
  4. Step 4: Simplify right side
    15,175.98x = 265,368,713.89
  5. Step 5: Solve for x
    x = 265,368,713.89/15,175.98
  6. Step 6: Final answer
    x = 17,486.10

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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.