Home / 21,381.96-29,500.48-12,427.80

Finding the Fourth Proportional to 21,381.96, 29,500.48 and 12,427.80

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Solution

The fourth proportional to 21,381.96, 29,500.48 and 12,427.80 is: 17,146.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.96 : 29,500.48 = 12,427.80 : x
  2. Step 2: Convert to fraction form
    21,381.96/29,500.48 = 12,427.80/x
  3. Step 3: Cross multiply
    21,381.96x = 29,500.48 × 12,427.80
  4. Step 4: Simplify right side
    21,381.96x = 366,626,065.34
  5. Step 5: Solve for x
    x = 366,626,065.34/21,381.96
  6. Step 6: Final answer
    x = 17,146.51

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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.