Home / 15,128.98-20,879.71-8,669.23

Finding the Fourth Proportional to 15,128.98, 20,879.71 and 8,669.23

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Solution

The fourth proportional to 15,128.98, 20,879.71 and 8,669.23 is: 11,964.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.98 : 20,879.71 = 8,669.23 : x
  2. Step 2: Convert to fraction form
    15,128.98/20,879.71 = 8,669.23/x
  3. Step 3: Cross multiply
    15,128.98x = 20,879.71 × 8,669.23
  4. Step 4: Simplify right side
    15,128.98x = 181,010,934.45
  5. Step 5: Solve for x
    x = 181,010,934.45/15,128.98
  6. Step 6: Final answer
    x = 11,964.52

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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.