Home / 13,779.28-19,017.05-8,190.28

Finding the Fourth Proportional to 13,779.28, 19,017.05 and 8,190.28

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Solution

The fourth proportional to 13,779.28, 19,017.05 and 8,190.28 is: 11,303.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.28 : 19,017.05 = 8,190.28 : x
  2. Step 2: Convert to fraction form
    13,779.28/19,017.05 = 8,190.28/x
  3. Step 3: Cross multiply
    13,779.28x = 19,017.05 × 8,190.28
  4. Step 4: Simplify right side
    13,779.28x = 155,754,947.09
  5. Step 5: Solve for x
    x = 155,754,947.09/13,779.28
  6. Step 6: Final answer
    x = 11,303.56

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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.