Home / 28,828.13-39,782.84-15,580.13

Finding the Fourth Proportional to 28,828.13, 39,782.84 and 15,580.13

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Solution

The fourth proportional to 28,828.13, 39,782.84 and 15,580.13 is: 21,500.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,828.13 : 39,782.84 = 15,580.13 : x
  2. Step 2: Convert to fraction form
    28,828.13/39,782.84 = 15,580.13/x
  3. Step 3: Cross multiply
    28,828.13x = 39,782.84 × 15,580.13
  4. Step 4: Simplify right side
    28,828.13x = 619,821,542.15
  5. Step 5: Solve for x
    x = 619,821,542.15/28,828.13
  6. Step 6: Final answer
    x = 21,500.58

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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.