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Finding the Fourth Proportional to 13,722.99, 18,937.29 and 7,754.31

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Solution

The fourth proportional to 13,722.99, 18,937.29 and 7,754.31 is: 10,700.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.99 : 18,937.29 = 7,754.31 : x
  2. Step 2: Convert to fraction form
    13,722.99/18,937.29 = 7,754.31/x
  3. Step 3: Cross multiply
    13,722.99x = 18,937.29 × 7,754.31
  4. Step 4: Simplify right side
    13,722.99x = 146,845,617.22
  5. Step 5: Solve for x
    x = 146,845,617.22/13,722.99
  6. Step 6: Final answer
    x = 10,700.70

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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.