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Finding the Fourth Proportional to 8,556.80, 11,808.40 and 4,830.80

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Solution

The fourth proportional to 8,556.80, 11,808.40 and 4,830.80 is: 6,666.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,556.80 : 11,808.40 = 4,830.80 : x
  2. Step 2: Convert to fraction form
    8,556.80/11,808.40 = 4,830.80/x
  3. Step 3: Cross multiply
    8,556.80x = 11,808.40 × 4,830.80
  4. Step 4: Simplify right side
    8,556.80x = 57,044,018.72
  5. Step 5: Solve for x
    x = 57,044,018.72/8,556.80
  6. Step 6: Final answer
    x = 6,666.51

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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.