Home / 21,228.82-29,291.02-12,276.09

Finding the Fourth Proportional to 21,228.82, 29,291.02 and 12,276.09

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Solution

The fourth proportional to 21,228.82, 29,291.02 and 12,276.09 is: 16,938.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.82 : 29,291.02 = 12,276.09 : x
  2. Step 2: Convert to fraction form
    21,228.82/29,291.02 = 12,276.09/x
  3. Step 3: Cross multiply
    21,228.82x = 29,291.02 × 12,276.09
  4. Step 4: Simplify right side
    21,228.82x = 359,579,167.02
  5. Step 5: Solve for x
    x = 359,579,167.02/21,228.82
  6. Step 6: Final answer
    x = 16,938.26

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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.