Home / 20,685.89-31,017.06-14,120.03

Finding the Fourth Proportional to 20,685.89, 31,017.06 and 14,120.03

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Solution

The fourth proportional to 20,685.89, 31,017.06 and 14,120.03 is: 21,172.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.89 : 31,017.06 = 14,120.03 : x
  2. Step 2: Convert to fraction form
    20,685.89/31,017.06 = 14,120.03/x
  3. Step 3: Cross multiply
    20,685.89x = 31,017.06 × 14,120.03
  4. Step 4: Simplify right side
    20,685.89x = 437,961,817.71
  5. Step 5: Solve for x
    x = 437,961,817.71/20,685.89
  6. Step 6: Final answer
    x = 21,172.01

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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.