Home / 21,317.68-29,418.48-11,886.32

Finding the Fourth Proportional to 21,317.68, 29,418.48 and 11,886.32

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Solution

The fourth proportional to 21,317.68, 29,418.48 and 11,886.32 is: 16,403.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.68 : 29,418.48 = 11,886.32 : x
  2. Step 2: Convert to fraction form
    21,317.68/29,418.48 = 11,886.32/x
  3. Step 3: Cross multiply
    21,317.68x = 29,418.48 × 11,886.32
  4. Step 4: Simplify right side
    21,317.68x = 349,677,467.19
  5. Step 5: Solve for x
    x = 349,677,467.19/21,317.68
  6. Step 6: Final answer
    x = 16,403.17

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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.