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Finding the Fourth Proportional to 21,113.94, 29,136.02 and 11,681.94

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Solution

The fourth proportional to 21,113.94, 29,136.02 and 11,681.94 is: 16,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.94 : 29,136.02 = 11,681.94 : x
  2. Step 2: Convert to fraction form
    21,113.94/29,136.02 = 11,681.94/x
  3. Step 3: Cross multiply
    21,113.94x = 29,136.02 × 11,681.94
  4. Step 4: Simplify right side
    21,113.94x = 340,365,237.48
  5. Step 5: Solve for x
    x = 340,365,237.48/21,113.94
  6. Step 6: Final answer
    x = 16,120.40

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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.