Home / 19,121.30-28,683.72-7,435.40

Finding the Fourth Proportional to 19,121.30, 28,683.72 and 7,435.40

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Solution

The fourth proportional to 19,121.30, 28,683.72 and 7,435.40 is: 11,153.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,121.30 : 28,683.72 = 7,435.40 : x
  2. Step 2: Convert to fraction form
    19,121.30/28,683.72 = 7,435.40/x
  3. Step 3: Cross multiply
    19,121.30x = 28,683.72 × 7,435.40
  4. Step 4: Simplify right side
    19,121.30x = 213,274,931.69
  5. Step 5: Solve for x
    x = 213,274,931.69/19,121.30
  6. Step 6: Final answer
    x = 11,153.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.