Home / 7,890.58-11,784.71-7,148.71

Finding the Fourth Proportional to 7,890.58, 11,784.71 and 7,148.71

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Solution

The fourth proportional to 7,890.58, 11,784.71 and 7,148.71 is: 10,676.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.58 : 11,784.71 = 7,148.71 : x
  2. Step 2: Convert to fraction form
    7,890.58/11,784.71 = 7,148.71/x
  3. Step 3: Cross multiply
    7,890.58x = 11,784.71 × 7,148.71
  4. Step 4: Simplify right side
    7,890.58x = 84,245,474.22
  5. Step 5: Solve for x
    x = 84,245,474.22/7,890.58
  6. Step 6: Final answer
    x = 10,676.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.