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Finding the Fourth Proportional to 13,266.44, 19,978.67 and 11,555.72

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Solution

The fourth proportional to 13,266.44, 19,978.67 and 11,555.72 is: 17,402.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,266.44 : 19,978.67 = 11,555.72 : x
  2. Step 2: Convert to fraction form
    13,266.44/19,978.67 = 11,555.72/x
  3. Step 3: Cross multiply
    13,266.44x = 19,978.67 × 11,555.72
  4. Step 4: Simplify right side
    13,266.44x = 230,867,916.49
  5. Step 5: Solve for x
    x = 230,867,916.49/13,266.44
  6. Step 6: Final answer
    x = 17,402.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.