Home / 12,429.29-18,643.94-8,521.85

Finding the Fourth Proportional to 12,429.29, 18,643.94 and 8,521.85

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Solution

The fourth proportional to 12,429.29, 18,643.94 and 8,521.85 is: 12,782.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.29 : 18,643.94 = 8,521.85 : x
  2. Step 2: Convert to fraction form
    12,429.29/18,643.94 = 8,521.85/x
  3. Step 3: Cross multiply
    12,429.29x = 18,643.94 × 8,521.85
  4. Step 4: Simplify right side
    12,429.29x = 158,880,724.26
  5. Step 5: Solve for x
    x = 158,880,724.26/12,429.29
  6. Step 6: Final answer
    x = 12,782.77

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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.