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Finding the Fourth Proportional to 13,643.70, 18,806.36 and 10,188.70

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Solution

The fourth proportional to 13,643.70, 18,806.36 and 10,188.70 is: 14,044.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,643.70 : 18,806.36 = 10,188.70 : x
  2. Step 2: Convert to fraction form
    13,643.70/18,806.36 = 10,188.70/x
  3. Step 3: Cross multiply
    13,643.70x = 18,806.36 × 10,188.70
  4. Step 4: Simplify right side
    13,643.70x = 191,612,360.13
  5. Step 5: Solve for x
    x = 191,612,360.13/13,643.70
  6. Step 6: Final answer
    x = 14,044.02

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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.