Home / 8,491.20-11,729.07-7,079.51

Finding the Fourth Proportional to 8,491.20, 11,729.07 and 7,079.51

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Solution

The fourth proportional to 8,491.20, 11,729.07 and 7,079.51 is: 9,779.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.20 : 11,729.07 = 7,079.51 : x
  2. Step 2: Convert to fraction form
    8,491.20/11,729.07 = 7,079.51/x
  3. Step 3: Cross multiply
    8,491.20x = 11,729.07 × 7,079.51
  4. Step 4: Simplify right side
    8,491.20x = 83,036,009.71
  5. Step 5: Solve for x
    x = 83,036,009.71/8,491.20
  6. Step 6: Final answer
    x = 9,779.07

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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.