Home / 21,124.65-29,143.71-13,569.93

Finding the Fourth Proportional to 21,124.65, 29,143.71 and 13,569.93

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Solution

The fourth proportional to 21,124.65, 29,143.71 and 13,569.93 is: 18,721.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.65 : 29,143.71 = 13,569.93 : x
  2. Step 2: Convert to fraction form
    21,124.65/29,143.71 = 13,569.93/x
  3. Step 3: Cross multiply
    21,124.65x = 29,143.71 × 13,569.93
  4. Step 4: Simplify right side
    21,124.65x = 395,478,104.64
  5. Step 5: Solve for x
    x = 395,478,104.64/21,124.65
  6. Step 6: Final answer
    x = 18,721.17

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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.