Home / 10,879.47-15,009.98-6,401.79

Finding the Fourth Proportional to 10,879.47, 15,009.98 and 6,401.79

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Solution

The fourth proportional to 10,879.47, 15,009.98 and 6,401.79 is: 8,832.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.47 : 15,009.98 = 6,401.79 : x
  2. Step 2: Convert to fraction form
    10,879.47/15,009.98 = 6,401.79/x
  3. Step 3: Cross multiply
    10,879.47x = 15,009.98 × 6,401.79
  4. Step 4: Simplify right side
    10,879.47x = 96,090,707.86
  5. Step 5: Solve for x
    x = 96,090,707.86/10,879.47
  6. Step 6: Final answer
    x = 8,832.30

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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.