Home / 19,435.20-29,152.80-7,121.60

Finding the Fourth Proportional to 19,435.20, 29,152.80 and 7,121.60

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Solution

The fourth proportional to 19,435.20, 29,152.80 and 7,121.60 is: 10,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,435.20 : 29,152.80 = 7,121.60 : x
  2. Step 2: Convert to fraction form
    19,435.20/29,152.80 = 7,121.60/x
  3. Step 3: Cross multiply
    19,435.20x = 29,152.80 × 7,121.60
  4. Step 4: Simplify right side
    19,435.20x = 207,614,580.48
  5. Step 5: Solve for x
    x = 207,614,580.48/19,435.20
  6. Step 6: Final answer
    x = 10,682.40

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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.