Home / 20,821.30-28,715.23-14,759.55

Finding the Fourth Proportional to 20,821.30, 28,715.23 and 14,759.55

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Solution

The fourth proportional to 20,821.30, 28,715.23 and 14,759.55 is: 20,355.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.30 : 28,715.23 = 14,759.55 : x
  2. Step 2: Convert to fraction form
    20,821.30/28,715.23 = 14,759.55/x
  3. Step 3: Cross multiply
    20,821.30x = 28,715.23 × 14,759.55
  4. Step 4: Simplify right side
    20,821.30x = 423,824,054.05
  5. Step 5: Solve for x
    x = 423,824,054.05/20,821.30
  6. Step 6: Final answer
    x = 20,355.31

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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.