Home / 28,865.04-39,845.16-21,788.88

Finding the Fourth Proportional to 28,865.04, 39,845.16 and 21,788.88

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Solution

The fourth proportional to 28,865.04, 39,845.16 and 21,788.88 is: 30,077.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,865.04 : 39,845.16 = 21,788.88 : x
  2. Step 2: Convert to fraction form
    28,865.04/39,845.16 = 21,788.88/x
  3. Step 3: Cross multiply
    28,865.04x = 39,845.16 × 21,788.88
  4. Step 4: Simplify right side
    28,865.04x = 868,181,409.82
  5. Step 5: Solve for x
    x = 868,181,409.82/28,865.04
  6. Step 6: Final answer
    x = 30,077.26

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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.