Home / 14,121.81-21,156.90-6,611.59

Finding the Fourth Proportional to 14,121.81, 21,156.90 and 6,611.59

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Solution

The fourth proportional to 14,121.81, 21,156.90 and 6,611.59 is: 9,905.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.81 : 21,156.90 = 6,611.59 : x
  2. Step 2: Convert to fraction form
    14,121.81/21,156.90 = 6,611.59/x
  3. Step 3: Cross multiply
    14,121.81x = 21,156.90 × 6,611.59
  4. Step 4: Simplify right side
    14,121.81x = 139,880,750.12
  5. Step 5: Solve for x
    x = 139,880,750.12/14,121.81
  6. Step 6: Final answer
    x = 9,905.30

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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.