Home / 21,306.33-29,402.81-12,813.35

Finding the Fourth Proportional to 21,306.33, 29,402.81 and 12,813.35

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Solution

The fourth proportional to 21,306.33, 29,402.81 and 12,813.35 is: 17,682.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.33 : 29,402.81 = 12,813.35 : x
  2. Step 2: Convert to fraction form
    21,306.33/29,402.81 = 12,813.35/x
  3. Step 3: Cross multiply
    21,306.33x = 29,402.81 × 12,813.35
  4. Step 4: Simplify right side
    21,306.33x = 376,748,284.43
  5. Step 5: Solve for x
    x = 376,748,284.43/21,306.33
  6. Step 6: Final answer
    x = 17,682.46

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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.