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Finding the Fourth Proportional to 13,205.79, 18,225.72 and 8,503.74

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Solution

The fourth proportional to 13,205.79, 18,225.72 and 8,503.74 is: 11,736.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.79 : 18,225.72 = 8,503.74 : x
  2. Step 2: Convert to fraction form
    13,205.79/18,225.72 = 8,503.74/x
  3. Step 3: Cross multiply
    13,205.79x = 18,225.72 × 8,503.74
  4. Step 4: Simplify right side
    13,205.79x = 154,986,784.19
  5. Step 5: Solve for x
    x = 154,986,784.19/13,205.79
  6. Step 6: Final answer
    x = 11,736.28

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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.