Home / 13,759.48-18,988.72-7,790.36

Finding the Fourth Proportional to 13,759.48, 18,988.72 and 7,790.36

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Solution

The fourth proportional to 13,759.48, 18,988.72 and 7,790.36 is: 10,751.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.48 : 18,988.72 = 7,790.36 : x
  2. Step 2: Convert to fraction form
    13,759.48/18,988.72 = 7,790.36/x
  3. Step 3: Cross multiply
    13,759.48x = 18,988.72 × 7,790.36
  4. Step 4: Simplify right side
    13,759.48x = 147,928,964.74
  5. Step 5: Solve for x
    x = 147,928,964.74/13,759.48
  6. Step 6: Final answer
    x = 10,751.06

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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.