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Finding the Fourth Proportional to 13,736.98, 18,957.09 and 7,449.40

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Solution

The fourth proportional to 13,736.98, 18,957.09 and 7,449.40 is: 10,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,736.98 : 18,957.09 = 7,449.40 : x
  2. Step 2: Convert to fraction form
    13,736.98/18,957.09 = 7,449.40/x
  3. Step 3: Cross multiply
    13,736.98x = 18,957.09 × 7,449.40
  4. Step 4: Simplify right side
    13,736.98x = 141,218,946.25
  5. Step 5: Solve for x
    x = 141,218,946.25/13,736.98
  6. Step 6: Final answer
    x = 10,280.20

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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.