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Finding the Fourth Proportional to 11,889.79, 17,916.47 and 9,855.57

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Solution

The fourth proportional to 11,889.79, 17,916.47 and 9,855.57 is: 14,851.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,889.79 : 17,916.47 = 9,855.57 : x
  2. Step 2: Convert to fraction form
    11,889.79/17,916.47 = 9,855.57/x
  3. Step 3: Cross multiply
    11,889.79x = 17,916.47 × 9,855.57
  4. Step 4: Simplify right side
    11,889.79x = 176,577,134.54
  5. Step 5: Solve for x
    x = 176,577,134.54/11,889.79
  6. Step 6: Final answer
    x = 14,851.16

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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.