Home / 7,111.60-9,816.09-4,128.77

Finding the Fourth Proportional to 7,111.60, 9,816.09 and 4,128.77

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Solution

The fourth proportional to 7,111.60, 9,816.09 and 4,128.77 is: 5,698.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.60 : 9,816.09 = 4,128.77 : x
  2. Step 2: Convert to fraction form
    7,111.60/9,816.09 = 4,128.77/x
  3. Step 3: Cross multiply
    7,111.60x = 9,816.09 × 4,128.77
  4. Step 4: Simplify right side
    7,111.60x = 40,528,386.97
  5. Step 5: Solve for x
    x = 40,528,386.97/7,111.60
  6. Step 6: Final answer
    x = 5,698.91

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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.