Home / 12,990.31-19,480.64-4,668.05

Finding the Fourth Proportional to 12,990.31, 19,480.64 and 4,668.05

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Solution

The fourth proportional to 12,990.31, 19,480.64 and 4,668.05 is: 7,000.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.31 : 19,480.64 = 4,668.05 : x
  2. Step 2: Convert to fraction form
    12,990.31/19,480.64 = 4,668.05/x
  3. Step 3: Cross multiply
    12,990.31x = 19,480.64 × 4,668.05
  4. Step 4: Simplify right side
    12,990.31x = 90,936,626.91
  5. Step 5: Solve for x
    x = 90,936,626.91/12,990.31
  6. Step 6: Final answer
    x = 7,000.34

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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.