Home / 21,288.99-29,378.42-11,857.35

Finding the Fourth Proportional to 21,288.99, 29,378.42 and 11,857.35

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Solution

The fourth proportional to 21,288.99, 29,378.42 and 11,857.35 is: 16,362.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.99 : 29,378.42 = 11,857.35 : x
  2. Step 2: Convert to fraction form
    21,288.99/29,378.42 = 11,857.35/x
  3. Step 3: Cross multiply
    21,288.99x = 29,378.42 × 11,857.35
  4. Step 4: Simplify right side
    21,288.99x = 348,350,002.21
  5. Step 5: Solve for x
    x = 348,350,002.21/21,288.99
  6. Step 6: Final answer
    x = 16,362.92

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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.