Home / 21,309.24-29,406.88-11,878.40

Finding the Fourth Proportional to 21,309.24, 29,406.88 and 11,878.40

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Solution

The fourth proportional to 21,309.24, 29,406.88 and 11,878.40 is: 16,392.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.24 : 29,406.88 = 11,878.40 : x
  2. Step 2: Convert to fraction form
    21,309.24/29,406.88 = 11,878.40/x
  3. Step 3: Cross multiply
    21,309.24x = 29,406.88 × 11,878.40
  4. Step 4: Simplify right side
    21,309.24x = 349,306,683.39
  5. Step 5: Solve for x
    x = 349,306,683.39/21,309.24
  6. Step 6: Final answer
    x = 16,392.26

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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.