Home / 21,015.18-31,491.72-11,643.84

Finding the Fourth Proportional to 21,015.18, 31,491.72 and 11,643.84

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Solution

The fourth proportional to 21,015.18, 31,491.72 and 11,643.84 is: 17,448.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.18 : 31,491.72 = 11,643.84 : x
  2. Step 2: Convert to fraction form
    21,015.18/31,491.72 = 11,643.84/x
  3. Step 3: Cross multiply
    21,015.18x = 31,491.72 × 11,643.84
  4. Step 4: Simplify right side
    21,015.18x = 366,684,549.00
  5. Step 5: Solve for x
    x = 366,684,549.00/21,015.18
  6. Step 6: Final answer
    x = 17,448.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.