Home / 21,388-29,515.44-13,004.50

Finding the Fourth Proportional to 21,388, 29,515.44 and 13,004.50

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Solution

The fourth proportional to 21,388, 29,515.44 and 13,004.50 is: 17,946.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388 : 29,515.44 = 13,004.50 : x
  2. Step 2: Convert to fraction form
    21,388/29,515.44 = 13,004.50/x
  3. Step 3: Cross multiply
    21,388x = 29,515.44 × 13,004.50
  4. Step 4: Simplify right side
    21,388x = 383,833,539.48
  5. Step 5: Solve for x
    x = 383,833,539.48/21,388
  6. Step 6: Final answer
    x = 17,946.21

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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.