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Finding the Fourth Proportional to 14,685.51, 20,265.32 and 7,971.09

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Solution

The fourth proportional to 14,685.51, 20,265.32 and 7,971.09 is: 10,999.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,685.51 : 20,265.32 = 7,971.09 : x
  2. Step 2: Convert to fraction form
    14,685.51/20,265.32 = 7,971.09/x
  3. Step 3: Cross multiply
    14,685.51x = 20,265.32 × 7,971.09
  4. Step 4: Simplify right side
    14,685.51x = 161,536,689.60
  5. Step 5: Solve for x
    x = 161,536,689.60/14,685.51
  6. Step 6: Final answer
    x = 10,999.73

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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.