Home / 10,879.63-15,012.75-6,403.11

Finding the Fourth Proportional to 10,879.63, 15,012.75 and 6,403.11

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Solution

The fourth proportional to 10,879.63, 15,012.75 and 6,403.11 is: 8,835.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.63 : 15,012.75 = 6,403.11 : x
  2. Step 2: Convert to fraction form
    10,879.63/15,012.75 = 6,403.11/x
  3. Step 3: Cross multiply
    10,879.63x = 15,012.75 × 6,403.11
  4. Step 4: Simplify right side
    10,879.63x = 96,128,313.66
  5. Step 5: Solve for x
    x = 96,128,313.66/10,879.63
  6. Step 6: Final answer
    x = 8,835.63

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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.