Home / 7,826.90-10,801.28-4,991.76

Finding the Fourth Proportional to 7,826.90, 10,801.28 and 4,991.76

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Solution

The fourth proportional to 7,826.90, 10,801.28 and 4,991.76 is: 6,888.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,826.90 : 10,801.28 = 4,991.76 : x
  2. Step 2: Convert to fraction form
    7,826.90/10,801.28 = 4,991.76/x
  3. Step 3: Cross multiply
    7,826.90x = 10,801.28 × 4,991.76
  4. Step 4: Simplify right side
    7,826.90x = 53,917,409.93
  5. Step 5: Solve for x
    x = 53,917,409.93/7,826.90
  6. Step 6: Final answer
    x = 6,888.74

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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.