Home / 10,653.85-15,983.55-5,111.47

Finding the Fourth Proportional to 10,653.85, 15,983.55 and 5,111.47

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Solution

The fourth proportional to 10,653.85, 15,983.55 and 5,111.47 is: 7,668.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,653.85 : 15,983.55 = 5,111.47 : x
  2. Step 2: Convert to fraction form
    10,653.85/15,983.55 = 5,111.47/x
  3. Step 3: Cross multiply
    10,653.85x = 15,983.55 × 5,111.47
  4. Step 4: Simplify right side
    10,653.85x = 81,699,436.32
  5. Step 5: Solve for x
    x = 81,699,436.32/10,653.85
  6. Step 6: Final answer
    x = 7,668.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.