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Finding the Fourth Proportional to 7,289.98, 10,924.48 and 3,128.88

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Solution

The fourth proportional to 7,289.98, 10,924.48 and 3,128.88 is: 4,688.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,289.98 : 10,924.48 = 3,128.88 : x
  2. Step 2: Convert to fraction form
    7,289.98/10,924.48 = 3,128.88/x
  3. Step 3: Cross multiply
    7,289.98x = 10,924.48 × 3,128.88
  4. Step 4: Simplify right side
    7,289.98x = 34,181,386.98
  5. Step 5: Solve for x
    x = 34,181,386.98/7,289.98
  6. Step 6: Final answer
    x = 4,688.82

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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.