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Finding the Fourth Proportional to 13,642.59, 18,816.11 and 8,864.07

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Solution

The fourth proportional to 13,642.59, 18,816.11 and 8,864.07 is: 12,225.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,642.59 : 18,816.11 = 8,864.07 : x
  2. Step 2: Convert to fraction form
    13,642.59/18,816.11 = 8,864.07/x
  3. Step 3: Cross multiply
    13,642.59x = 18,816.11 × 8,864.07
  4. Step 4: Simplify right side
    13,642.59x = 166,787,271.85
  5. Step 5: Solve for x
    x = 166,787,271.85/13,642.59
  6. Step 6: Final answer
    x = 12,225.49

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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.