Home / 15,645.36-21,590.78-8,571.90

Finding the Fourth Proportional to 15,645.36, 21,590.78 and 8,571.90

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Solution

The fourth proportional to 15,645.36, 21,590.78 and 8,571.90 is: 11,829.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,645.36 : 21,590.78 = 8,571.90 : x
  2. Step 2: Convert to fraction form
    15,645.36/21,590.78 = 8,571.90/x
  3. Step 3: Cross multiply
    15,645.36x = 21,590.78 × 8,571.90
  4. Step 4: Simplify right side
    15,645.36x = 185,073,964.22
  5. Step 5: Solve for x
    x = 185,073,964.22/15,645.36
  6. Step 6: Final answer
    x = 11,829.32

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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.