Home / 13,719.48-18,931.94-7,749.98

Finding the Fourth Proportional to 13,719.48, 18,931.94 and 7,749.98

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Solution

The fourth proportional to 13,719.48, 18,931.94 and 7,749.98 is: 10,694.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.48 : 18,931.94 = 7,749.98 : x
  2. Step 2: Convert to fraction form
    13,719.48/18,931.94 = 7,749.98/x
  3. Step 3: Cross multiply
    13,719.48x = 18,931.94 × 7,749.98
  4. Step 4: Simplify right side
    13,719.48x = 146,722,156.36
  5. Step 5: Solve for x
    x = 146,722,156.36/13,719.48
  6. Step 6: Final answer
    x = 10,694.44

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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.