Home / 30,872.04-42,559.78-21,916.27

Finding the Fourth Proportional to 30,872.04, 42,559.78 and 21,916.27

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Solution

The fourth proportional to 30,872.04, 42,559.78 and 21,916.27 is: 30,213.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,872.04 : 42,559.78 = 21,916.27 : x
  2. Step 2: Convert to fraction form
    30,872.04/42,559.78 = 21,916.27/x
  3. Step 3: Cross multiply
    30,872.04x = 42,559.78 × 21,916.27
  4. Step 4: Simplify right side
    30,872.04x = 932,751,669.12
  5. Step 5: Solve for x
    x = 932,751,669.12/30,872.04
  6. Step 6: Final answer
    x = 30,213.48

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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.