Home / 21,378.42-29,499.67-11,817.02

Finding the Fourth Proportional to 21,378.42, 29,499.67 and 11,817.02

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Solution

The fourth proportional to 21,378.42, 29,499.67 and 11,817.02 is: 16,306.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.42 : 29,499.67 = 11,817.02 : x
  2. Step 2: Convert to fraction form
    21,378.42/29,499.67 = 11,817.02/x
  3. Step 3: Cross multiply
    21,378.42x = 29,499.67 × 11,817.02
  4. Step 4: Simplify right side
    21,378.42x = 348,598,136.77
  5. Step 5: Solve for x
    x = 348,598,136.77/21,378.42
  6. Step 6: Final answer
    x = 16,306.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.