Home / 11,222.40-15,490.80-7,697.28

Finding the Fourth Proportional to 11,222.40, 15,490.80 and 7,697.28

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Solution

The fourth proportional to 11,222.40, 15,490.80 and 7,697.28 is: 10,624.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,222.40 : 15,490.80 = 7,697.28 : x
  2. Step 2: Convert to fraction form
    11,222.40/15,490.80 = 7,697.28/x
  3. Step 3: Cross multiply
    11,222.40x = 15,490.80 × 7,697.28
  4. Step 4: Simplify right side
    11,222.40x = 119,237,025.02
  5. Step 5: Solve for x
    x = 119,237,025.02/11,222.40
  6. Step 6: Final answer
    x = 10,624.91

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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.