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Finding the Fourth Proportional to 14,005.29, 20,986.02 and 11,916.69

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Solution

The fourth proportional to 14,005.29, 20,986.02 and 11,916.69 is: 17,856.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.29 : 20,986.02 = 11,916.69 : x
  2. Step 2: Convert to fraction form
    14,005.29/20,986.02 = 11,916.69/x
  3. Step 3: Cross multiply
    14,005.29x = 20,986.02 × 11,916.69
  4. Step 4: Simplify right side
    14,005.29x = 250,083,894.67
  5. Step 5: Solve for x
    x = 250,083,894.67/14,005.29
  6. Step 6: Final answer
    x = 17,856.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.