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Finding the Fourth Proportional to 11,920.58, 17,880.08 and 4,898.78

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Solution

The fourth proportional to 11,920.58, 17,880.08 and 4,898.78 is: 7,347.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.58 : 17,880.08 = 4,898.78 : x
  2. Step 2: Convert to fraction form
    11,920.58/17,880.08 = 4,898.78/x
  3. Step 3: Cross multiply
    11,920.58x = 17,880.08 × 4,898.78
  4. Step 4: Simplify right side
    11,920.58x = 87,590,549.83
  5. Step 5: Solve for x
    x = 87,590,549.83/11,920.58
  6. Step 6: Final answer
    x = 7,347.84

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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.