Home / 21,309.36-29,407.50-11,878.56

Finding the Fourth Proportional to 21,309.36, 29,407.50 and 11,878.56

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Solution

The fourth proportional to 21,309.36, 29,407.50 and 11,878.56 is: 16,392.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.36 : 29,407.50 = 11,878.56 : x
  2. Step 2: Convert to fraction form
    21,309.36/29,407.50 = 11,878.56/x
  3. Step 3: Cross multiply
    21,309.36x = 29,407.50 × 11,878.56
  4. Step 4: Simplify right side
    21,309.36x = 349,318,753.20
  5. Step 5: Solve for x
    x = 349,318,753.20/21,309.36
  6. Step 6: Final answer
    x = 16,392.74

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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.