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Finding the Fourth Proportional to 14,861.40, 20,506.14 and 8,485.08

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Solution

The fourth proportional to 14,861.40, 20,506.14 and 8,485.08 is: 11,707.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,861.40 : 20,506.14 = 8,485.08 : x
  2. Step 2: Convert to fraction form
    14,861.40/20,506.14 = 8,485.08/x
  3. Step 3: Cross multiply
    14,861.40x = 20,506.14 × 8,485.08
  4. Step 4: Simplify right side
    14,861.40x = 173,996,238.39
  5. Step 5: Solve for x
    x = 173,996,238.39/14,861.40
  6. Step 6: Final answer
    x = 11,707.93

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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.