Home / 28,561.77-39,415.29-15,640.99

Finding the Fourth Proportional to 28,561.77, 39,415.29 and 15,640.99

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Solution

The fourth proportional to 28,561.77, 39,415.29 and 15,640.99 is: 21,584.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,561.77 : 39,415.29 = 15,640.99 : x
  2. Step 2: Convert to fraction form
    28,561.77/39,415.29 = 15,640.99/x
  3. Step 3: Cross multiply
    28,561.77x = 39,415.29 × 15,640.99
  4. Step 4: Simplify right side
    28,561.77x = 616,494,156.74
  5. Step 5: Solve for x
    x = 616,494,156.74/28,561.77
  6. Step 6: Final answer
    x = 21,584.59

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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.