Home / 13,638.16-18,739.10-10,838.80

Finding the Fourth Proportional to 13,638.16, 18,739.10 and 10,838.80

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Solution

The fourth proportional to 13,638.16, 18,739.10 and 10,838.80 is: 14,892.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.16 : 18,739.10 = 10,838.80 : x
  2. Step 2: Convert to fraction form
    13,638.16/18,739.10 = 10,838.80/x
  3. Step 3: Cross multiply
    13,638.16x = 18,739.10 × 10,838.80
  4. Step 4: Simplify right side
    13,638.16x = 203,109,357.08
  5. Step 5: Solve for x
    x = 203,109,357.08/13,638.16
  6. Step 6: Final answer
    x = 14,892.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.