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Finding the Fourth Proportional to 7,989.76, 11,980.80 and 4,526.08

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Solution

The fourth proportional to 7,989.76, 11,980.80 and 4,526.08 is: 6,786.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.76 : 11,980.80 = 4,526.08 : x
  2. Step 2: Convert to fraction form
    7,989.76/11,980.80 = 4,526.08/x
  3. Step 3: Cross multiply
    7,989.76x = 11,980.80 × 4,526.08
  4. Step 4: Simplify right side
    7,989.76x = 54,226,059.26
  5. Step 5: Solve for x
    x = 54,226,059.26/7,989.76
  6. Step 6: Final answer
    x = 6,786.94

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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.