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Finding the Fourth Proportional to 13,869.68, 19,127.68 and 9,158.72

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Solution

The fourth proportional to 13,869.68, 19,127.68 and 9,158.72 is: 12,630.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.68 : 19,127.68 = 9,158.72 : x
  2. Step 2: Convert to fraction form
    13,869.68/19,127.68 = 9,158.72/x
  3. Step 3: Cross multiply
    13,869.68x = 19,127.68 × 9,158.72
  4. Step 4: Simplify right side
    13,869.68x = 175,185,065.37
  5. Step 5: Solve for x
    x = 175,185,065.37/13,869.68
  6. Step 6: Final answer
    x = 12,630.79

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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.