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Finding the Fourth Proportional to 28,028.80, 41,970.30 and 18,114.40

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Solution

The fourth proportional to 28,028.80, 41,970.30 and 18,114.40 is: 27,124.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,028.80 : 41,970.30 = 18,114.40 : x
  2. Step 2: Convert to fraction form
    28,028.80/41,970.30 = 18,114.40/x
  3. Step 3: Cross multiply
    28,028.80x = 41,970.30 × 18,114.40
  4. Step 4: Simplify right side
    28,028.80x = 760,266,802.32
  5. Step 5: Solve for x
    x = 760,266,802.32/28,028.80
  6. Step 6: Final answer
    x = 27,124.49

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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.