Home / 20,706.74-31,059.96-12,389.06

Finding the Fourth Proportional to 20,706.74, 31,059.96 and 12,389.06

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Solution

The fourth proportional to 20,706.74, 31,059.96 and 12,389.06 is: 18,583.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.74 : 31,059.96 = 12,389.06 : x
  2. Step 2: Convert to fraction form
    20,706.74/31,059.96 = 12,389.06/x
  3. Step 3: Cross multiply
    20,706.74x = 31,059.96 × 12,389.06
  4. Step 4: Simplify right side
    20,706.74x = 384,803,708.04
  5. Step 5: Solve for x
    x = 384,803,708.04/20,706.74
  6. Step 6: Final answer
    x = 18,583.50

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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.