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Finding the Fourth Proportional to 10,775.76, 14,879.16 and 7,000.80

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Solution

The fourth proportional to 10,775.76, 14,879.16 and 7,000.80 is: 9,666.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,775.76 : 14,879.16 = 7,000.80 : x
  2. Step 2: Convert to fraction form
    10,775.76/14,879.16 = 7,000.80/x
  3. Step 3: Cross multiply
    10,775.76x = 14,879.16 × 7,000.80
  4. Step 4: Simplify right side
    10,775.76x = 104,166,023.33
  5. Step 5: Solve for x
    x = 104,166,023.33/10,775.76
  6. Step 6: Final answer
    x = 9,666.70

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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.