Home / 21,306.72-29,403.41-11,875.89

Finding the Fourth Proportional to 21,306.72, 29,403.41 and 11,875.89

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Solution

The fourth proportional to 21,306.72, 29,403.41 and 11,875.89 is: 16,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.72 : 29,403.41 = 11,875.89 : x
  2. Step 2: Convert to fraction form
    21,306.72/29,403.41 = 11,875.89/x
  3. Step 3: Cross multiply
    21,306.72x = 29,403.41 × 11,875.89
  4. Step 4: Simplify right side
    21,306.72x = 349,191,662.78
  5. Step 5: Solve for x
    x = 349,191,662.78/21,306.72
  6. Step 6: Final answer
    x = 16,388.80

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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.