Home / 21,307.28-29,405.32-11,875.82

Finding the Fourth Proportional to 21,307.28, 29,405.32 and 11,875.82

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Solution

The fourth proportional to 21,307.28, 29,405.32 and 11,875.82 is: 16,389.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.28 : 29,405.32 = 11,875.82 : x
  2. Step 2: Convert to fraction form
    21,307.28/29,405.32 = 11,875.82/x
  3. Step 3: Cross multiply
    21,307.28x = 29,405.32 × 11,875.82
  4. Step 4: Simplify right side
    21,307.28x = 349,212,287.36
  5. Step 5: Solve for x
    x = 349,212,287.36/21,307.28
  6. Step 6: Final answer
    x = 16,389.34

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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.