Home / 28,705.68-39,650.58-21,950.28

Finding the Fourth Proportional to 28,705.68, 39,650.58 and 21,950.28

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Solution

The fourth proportional to 28,705.68, 39,650.58 and 21,950.28 is: 30,319.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,705.68 : 39,650.58 = 21,950.28 : x
  2. Step 2: Convert to fraction form
    28,705.68/39,650.58 = 21,950.28/x
  3. Step 3: Cross multiply
    28,705.68x = 39,650.58 × 21,950.28
  4. Step 4: Simplify right side
    28,705.68x = 870,341,333.16
  5. Step 5: Solve for x
    x = 870,341,333.16/28,705.68
  6. Step 6: Final answer
    x = 30,319.48

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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.