Home / 9,919.40-13,688.46-5,442.86

Finding the Fourth Proportional to 9,919.40, 13,688.46 and 5,442.86

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Solution

The fourth proportional to 9,919.40, 13,688.46 and 5,442.86 is: 7,510.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.40 : 13,688.46 = 5,442.86 : x
  2. Step 2: Convert to fraction form
    9,919.40/13,688.46 = 5,442.86/x
  3. Step 3: Cross multiply
    9,919.40x = 13,688.46 × 5,442.86
  4. Step 4: Simplify right side
    9,919.40x = 74,504,371.40
  5. Step 5: Solve for x
    x = 74,504,371.40/9,919.40
  6. Step 6: Final answer
    x = 7,510.98

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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.