Home / 21,578.84-29,776.76-15,916.68

Finding the Fourth Proportional to 21,578.84, 29,776.76 and 15,916.68

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Solution

The fourth proportional to 21,578.84, 29,776.76 and 15,916.68 is: 21,963.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,578.84 : 29,776.76 = 15,916.68 : x
  2. Step 2: Convert to fraction form
    21,578.84/29,776.76 = 15,916.68/x
  3. Step 3: Cross multiply
    21,578.84x = 29,776.76 × 15,916.68
  4. Step 4: Simplify right side
    21,578.84x = 473,947,160.36
  5. Step 5: Solve for x
    x = 473,947,160.36/21,578.84
  6. Step 6: Final answer
    x = 21,963.51

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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.