Home / 18,912.23-28,368.14-4,872.20

Finding the Fourth Proportional to 18,912.23, 28,368.14 and 4,872.20

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Solution

The fourth proportional to 18,912.23, 28,368.14 and 4,872.20 is: 7,308.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.23 : 28,368.14 = 4,872.20 : x
  2. Step 2: Convert to fraction form
    18,912.23/28,368.14 = 4,872.20/x
  3. Step 3: Cross multiply
    18,912.23x = 28,368.14 × 4,872.20
  4. Step 4: Simplify right side
    18,912.23x = 138,215,085.51
  5. Step 5: Solve for x
    x = 138,215,085.51/18,912.23
  6. Step 6: Final answer
    x = 7,308.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.