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Finding the Fourth Proportional to 14,918.98, 20,586.97 and 8,785.72

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Solution

The fourth proportional to 14,918.98, 20,586.97 and 8,785.72 is: 12,123.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,918.98 : 20,586.97 = 8,785.72 : x
  2. Step 2: Convert to fraction form
    14,918.98/20,586.97 = 8,785.72/x
  3. Step 3: Cross multiply
    14,918.98x = 20,586.97 × 8,785.72
  4. Step 4: Simplify right side
    14,918.98x = 180,871,231.74
  5. Step 5: Solve for x
    x = 180,871,231.74/14,918.98
  6. Step 6: Final answer
    x = 12,123.57

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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.