Home / 21,430.56-29,571.48-12,933.12

Finding the Fourth Proportional to 21,430.56, 29,571.48 and 12,933.12

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Solution

The fourth proportional to 21,430.56, 29,571.48 and 12,933.12 is: 17,846.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.56 : 29,571.48 = 12,933.12 : x
  2. Step 2: Convert to fraction form
    21,430.56/29,571.48 = 12,933.12/x
  3. Step 3: Cross multiply
    21,430.56x = 29,571.48 × 12,933.12
  4. Step 4: Simplify right side
    21,430.56x = 382,451,499.42
  5. Step 5: Solve for x
    x = 382,451,499.42/21,430.56
  6. Step 6: Final answer
    x = 17,846.08

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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.