Home / 20,821.68-28,715.75-14,759.93

Finding the Fourth Proportional to 20,821.68, 28,715.75 and 14,759.93

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Solution

The fourth proportional to 20,821.68, 28,715.75 and 14,759.93 is: 20,355.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.68 : 28,715.75 = 14,759.93 : x
  2. Step 2: Convert to fraction form
    20,821.68/28,715.75 = 14,759.93/x
  3. Step 3: Cross multiply
    20,821.68x = 28,715.75 × 14,759.93
  4. Step 4: Simplify right side
    20,821.68x = 423,842,460.90
  5. Step 5: Solve for x
    x = 423,842,460.90/20,821.68
  6. Step 6: Final answer
    x = 20,355.82

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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.