Home / 21,513.17-29,671.75-15,564.53

Finding the Fourth Proportional to 21,513.17, 29,671.75 and 15,564.53

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Solution

The fourth proportional to 21,513.17, 29,671.75 and 15,564.53 is: 21,467.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.17 : 29,671.75 = 15,564.53 : x
  2. Step 2: Convert to fraction form
    21,513.17/29,671.75 = 15,564.53/x
  3. Step 3: Cross multiply
    21,513.17x = 29,671.75 × 15,564.53
  4. Step 4: Simplify right side
    21,513.17x = 461,826,936.66
  5. Step 5: Solve for x
    x = 461,826,936.66/21,513.17
  6. Step 6: Final answer
    x = 21,467.17

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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.