Home / 28,290.35-39,018.15-18,219.62

Finding the Fourth Proportional to 28,290.35, 39,018.15 and 18,219.62

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Solution

The fourth proportional to 28,290.35, 39,018.15 and 18,219.62 is: 25,128.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.35 : 39,018.15 = 18,219.62 : x
  2. Step 2: Convert to fraction form
    28,290.35/39,018.15 = 18,219.62/x
  3. Step 3: Cross multiply
    28,290.35x = 39,018.15 × 18,219.62
  4. Step 4: Simplify right side
    28,290.35x = 710,895,671.01
  5. Step 5: Solve for x
    x = 710,895,671.01/28,290.35
  6. Step 6: Final answer
    x = 25,128.56

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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.