Home / 12,990.87-19,474.61-4,668.93

Finding the Fourth Proportional to 12,990.87, 19,474.61 and 4,668.93

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Solution

The fourth proportional to 12,990.87, 19,474.61 and 4,668.93 is: 6,999.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.87 : 19,474.61 = 4,668.93 : x
  2. Step 2: Convert to fraction form
    12,990.87/19,474.61 = 4,668.93/x
  3. Step 3: Cross multiply
    12,990.87x = 19,474.61 × 4,668.93
  4. Step 4: Simplify right side
    12,990.87x = 90,925,590.87
  5. Step 5: Solve for x
    x = 90,925,590.87/12,990.87
  6. Step 6: Final answer
    x = 6,999.19

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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.