Home / 21,640.28-29,866.86-15,669.77

Finding the Fourth Proportional to 21,640.28, 29,866.86 and 15,669.77

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Solution

The fourth proportional to 21,640.28, 29,866.86 and 15,669.77 is: 21,626.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.28 : 29,866.86 = 15,669.77 : x
  2. Step 2: Convert to fraction form
    21,640.28/29,866.86 = 15,669.77/x
  3. Step 3: Cross multiply
    21,640.28x = 29,866.86 × 15,669.77
  4. Step 4: Simplify right side
    21,640.28x = 468,006,677.49
  5. Step 5: Solve for x
    x = 468,006,677.49/21,640.28
  6. Step 6: Final answer
    x = 21,626.65

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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.