Home / 21,666.79-29,899.63-12,106.09

Finding the Fourth Proportional to 21,666.79, 29,899.63 and 12,106.09

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Solution

The fourth proportional to 21,666.79, 29,899.63 and 12,106.09 is: 16,706.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.79 : 29,899.63 = 12,106.09 : x
  2. Step 2: Convert to fraction form
    21,666.79/29,899.63 = 12,106.09/x
  3. Step 3: Cross multiply
    21,666.79x = 29,899.63 × 12,106.09
  4. Step 4: Simplify right side
    21,666.79x = 361,967,611.75
  5. Step 5: Solve for x
    x = 361,967,611.75/21,666.79
  6. Step 6: Final answer
    x = 16,706.10

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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.