Home / 13,869.12-19,139.76-8,283.36

Finding the Fourth Proportional to 13,869.12, 19,139.76 and 8,283.36

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Solution

The fourth proportional to 13,869.12, 19,139.76 and 8,283.36 is: 11,431.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.12 : 19,139.76 = 8,283.36 : x
  2. Step 2: Convert to fraction form
    13,869.12/19,139.76 = 8,283.36/x
  3. Step 3: Cross multiply
    13,869.12x = 19,139.76 × 8,283.36
  4. Step 4: Simplify right side
    13,869.12x = 158,541,522.39
  5. Step 5: Solve for x
    x = 158,541,522.39/13,869.12
  6. Step 6: Final answer
    x = 11,431.26

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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.