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Finding the Fourth Proportional to 13,899.34, 20,854.95 and 9,220.99

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Solution

The fourth proportional to 13,899.34, 20,854.95 and 9,220.99 is: 13,835.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,899.34 : 20,854.95 = 9,220.99 : x
  2. Step 2: Convert to fraction form
    13,899.34/20,854.95 = 9,220.99/x
  3. Step 3: Cross multiply
    13,899.34x = 20,854.95 × 9,220.99
  4. Step 4: Simplify right side
    13,899.34x = 192,303,285.40
  5. Step 5: Solve for x
    x = 192,303,285.40/13,899.34
  6. Step 6: Final answer
    x = 13,835.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.