Home / 21,346.03-29,455.28-12,391.78

Finding the Fourth Proportional to 21,346.03, 29,455.28 and 12,391.78

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Solution

The fourth proportional to 21,346.03, 29,455.28 and 12,391.78 is: 17,099.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,346.03 : 29,455.28 = 12,391.78 : x
  2. Step 2: Convert to fraction form
    21,346.03/29,455.28 = 12,391.78/x
  3. Step 3: Cross multiply
    21,346.03x = 29,455.28 × 12,391.78
  4. Step 4: Simplify right side
    21,346.03x = 365,003,315.70
  5. Step 5: Solve for x
    x = 365,003,315.70/21,346.03
  6. Step 6: Final answer
    x = 17,099.36

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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.