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Finding the Fourth Proportional to 14,685.42, 20,265.90 and 7,971.05

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Solution

The fourth proportional to 14,685.42, 20,265.90 and 7,971.05 is: 11,000.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,685.42 : 20,265.90 = 7,971.05 : x
  2. Step 2: Convert to fraction form
    14,685.42/20,265.90 = 7,971.05/x
  3. Step 3: Cross multiply
    14,685.42x = 20,265.90 × 7,971.05
  4. Step 4: Simplify right side
    14,685.42x = 161,540,502.20
  5. Step 5: Solve for x
    x = 161,540,502.20/14,685.42
  6. Step 6: Final answer
    x = 11,000.06

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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.