Home / 21,678.73-29,916.64-12,726.23

Finding the Fourth Proportional to 21,678.73, 29,916.64 and 12,726.23

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Solution

The fourth proportional to 21,678.73, 29,916.64 and 12,726.23 is: 17,562.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.73 : 29,916.64 = 12,726.23 : x
  2. Step 2: Convert to fraction form
    21,678.73/29,916.64 = 12,726.23/x
  3. Step 3: Cross multiply
    21,678.73x = 29,916.64 × 12,726.23
  4. Step 4: Simplify right side
    21,678.73x = 380,726,041.47
  5. Step 5: Solve for x
    x = 380,726,041.47/21,678.73
  6. Step 6: Final answer
    x = 17,562.19

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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.