Home / 21,391.55-29,459.53-20,933.63

Finding the Fourth Proportional to 21,391.55, 29,459.53 and 20,933.63

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Solution

The fourth proportional to 21,391.55, 29,459.53 and 20,933.63 is: 28,828.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.55 : 29,459.53 = 20,933.63 : x
  2. Step 2: Convert to fraction form
    21,391.55/29,459.53 = 20,933.63/x
  3. Step 3: Cross multiply
    21,391.55x = 29,459.53 × 20,933.63
  4. Step 4: Simplify right side
    21,391.55x = 616,694,900.99
  5. Step 5: Solve for x
    x = 616,694,900.99/21,391.55
  6. Step 6: Final answer
    x = 28,828.90

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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.