Home / 12,890.61-19,321.76-6,651.07

Finding the Fourth Proportional to 12,890.61, 19,321.76 and 6,651.07

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Solution

The fourth proportional to 12,890.61, 19,321.76 and 6,651.07 is: 9,969.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.61 : 19,321.76 = 6,651.07 : x
  2. Step 2: Convert to fraction form
    12,890.61/19,321.76 = 6,651.07/x
  3. Step 3: Cross multiply
    12,890.61x = 19,321.76 × 6,651.07
  4. Step 4: Simplify right side
    12,890.61x = 128,510,346.61
  5. Step 5: Solve for x
    x = 128,510,346.61/12,890.61
  6. Step 6: Final answer
    x = 9,969.30

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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.