Home / 10,128.45-13,983.77-6,356.79

Finding the Fourth Proportional to 10,128.45, 13,983.77 and 6,356.79

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Solution

The fourth proportional to 10,128.45, 13,983.77 and 6,356.79 is: 8,776.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.45 : 13,983.77 = 6,356.79 : x
  2. Step 2: Convert to fraction form
    10,128.45/13,983.77 = 6,356.79/x
  3. Step 3: Cross multiply
    10,128.45x = 13,983.77 × 6,356.79
  4. Step 4: Simplify right side
    10,128.45x = 88,891,857.51
  5. Step 5: Solve for x
    x = 88,891,857.51/10,128.45
  6. Step 6: Final answer
    x = 8,776.45

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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.