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Finding the Fourth Proportional to 19,790.64, 29,697.48 and 7,479.60

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Solution

The fourth proportional to 19,790.64, 29,697.48 and 7,479.60 is: 11,223.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.64 : 29,697.48 = 7,479.60 : x
  2. Step 2: Convert to fraction form
    19,790.64/29,697.48 = 7,479.60/x
  3. Step 3: Cross multiply
    19,790.64x = 29,697.48 × 7,479.60
  4. Step 4: Simplify right side
    19,790.64x = 222,125,271.41
  5. Step 5: Solve for x
    x = 222,125,271.41/19,790.64
  6. Step 6: Final answer
    x = 11,223.75

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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.