Home / 11,315.40-15,610.20-6,775.56

Finding the Fourth Proportional to 11,315.40, 15,610.20 and 6,775.56

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Solution

The fourth proportional to 11,315.40, 15,610.20 and 6,775.56 is: 9,347.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.40 : 15,610.20 = 6,775.56 : x
  2. Step 2: Convert to fraction form
    11,315.40/15,610.20 = 6,775.56/x
  3. Step 3: Cross multiply
    11,315.40x = 15,610.20 × 6,775.56
  4. Step 4: Simplify right side
    11,315.40x = 105,767,846.71
  5. Step 5: Solve for x
    x = 105,767,846.71/11,315.40
  6. Step 6: Final answer
    x = 9,347.25

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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.