Home / 13,758.55-18,987.75-7,790.26

Finding the Fourth Proportional to 13,758.55, 18,987.75 and 7,790.26

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Solution

The fourth proportional to 13,758.55, 18,987.75 and 7,790.26 is: 10,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.55 : 18,987.75 = 7,790.26 : x
  2. Step 2: Convert to fraction form
    13,758.55/18,987.75 = 7,790.26/x
  3. Step 3: Cross multiply
    13,758.55x = 18,987.75 × 7,790.26
  4. Step 4: Simplify right side
    13,758.55x = 147,919,509.32
  5. Step 5: Solve for x
    x = 147,919,509.32/13,758.55
  6. Step 6: Final answer
    x = 10,751.10

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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.