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Finding the Fourth Proportional to 9,940.80, 14,878.80 and 7,024.80

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Solution

The fourth proportional to 9,940.80, 14,878.80 and 7,024.80 is: 10,514.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,940.80 : 14,878.80 = 7,024.80 : x
  2. Step 2: Convert to fraction form
    9,940.80/14,878.80 = 7,024.80/x
  3. Step 3: Cross multiply
    9,940.80x = 14,878.80 × 7,024.80
  4. Step 4: Simplify right side
    9,940.80x = 104,520,594.24
  5. Step 5: Solve for x
    x = 104,520,594.24/9,940.80
  6. Step 6: Final answer
    x = 10,514.30

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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.