Home / 18,837.81-28,204.79-12,589.20

Finding the Fourth Proportional to 18,837.81, 28,204.79 and 12,589.20

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Solution

The fourth proportional to 18,837.81, 28,204.79 and 12,589.20 is: 18,849.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,837.81 : 28,204.79 = 12,589.20 : x
  2. Step 2: Convert to fraction form
    18,837.81/28,204.79 = 12,589.20/x
  3. Step 3: Cross multiply
    18,837.81x = 28,204.79 × 12,589.20
  4. Step 4: Simplify right side
    18,837.81x = 355,075,679.32
  5. Step 5: Solve for x
    x = 355,075,679.32/18,837.81
  6. Step 6: Final answer
    x = 18,849.10

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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.