Home / 19,639.90-29,401.98-12,964.09

Finding the Fourth Proportional to 19,639.90, 29,401.98 and 12,964.09

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Solution

The fourth proportional to 19,639.90, 29,401.98 and 12,964.09 is: 19,407.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.90 : 29,401.98 = 12,964.09 : x
  2. Step 2: Convert to fraction form
    19,639.90/29,401.98 = 12,964.09/x
  3. Step 3: Cross multiply
    19,639.90x = 29,401.98 × 12,964.09
  4. Step 4: Simplify right side
    19,639.90x = 381,169,914.90
  5. Step 5: Solve for x
    x = 381,169,914.90/19,639.90
  6. Step 6: Final answer
    x = 19,407.94

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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.