Home / 21,430.43-29,569.21-12,933.93

Finding the Fourth Proportional to 21,430.43, 29,569.21 and 12,933.93

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Solution

The fourth proportional to 21,430.43, 29,569.21 and 12,933.93 is: 17,845.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.43 : 29,569.21 = 12,933.93 : x
  2. Step 2: Convert to fraction form
    21,430.43/29,569.21 = 12,933.93/x
  3. Step 3: Cross multiply
    21,430.43x = 29,569.21 × 12,933.93
  4. Step 4: Simplify right side
    21,430.43x = 382,446,092.30
  5. Step 5: Solve for x
    x = 382,446,092.30/21,430.43
  6. Step 6: Final answer
    x = 17,845.94

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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.