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Finding the Fourth Proportional to 13,663.45, 20,423.08 and 11,870.45

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Solution

The fourth proportional to 13,663.45, 20,423.08 and 11,870.45 is: 17,743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.45 : 20,423.08 = 11,870.45 : x
  2. Step 2: Convert to fraction form
    13,663.45/20,423.08 = 11,870.45/x
  3. Step 3: Cross multiply
    13,663.45x = 20,423.08 × 11,870.45
  4. Step 4: Simplify right side
    13,663.45x = 242,431,072.52
  5. Step 5: Solve for x
    x = 242,431,072.52/13,663.45
  6. Step 6: Final answer
    x = 17,743.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.