Home / 18,969.81-28,445.40-11,075.28

Finding the Fourth Proportional to 18,969.81, 28,445.40 and 11,075.28

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Solution

The fourth proportional to 18,969.81, 28,445.40 and 11,075.28 is: 16,607.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.81 : 28,445.40 = 11,075.28 : x
  2. Step 2: Convert to fraction form
    18,969.81/28,445.40 = 11,075.28/x
  3. Step 3: Cross multiply
    18,969.81x = 28,445.40 × 11,075.28
  4. Step 4: Simplify right side
    18,969.81x = 315,040,769.71
  5. Step 5: Solve for x
    x = 315,040,769.71/18,969.81
  6. Step 6: Final answer
    x = 16,607.48

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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.