Home / 13,759.01-18,987.45-7,790.69

Finding the Fourth Proportional to 13,759.01, 18,987.45 and 7,790.69

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Solution

The fourth proportional to 13,759.01, 18,987.45 and 7,790.69 is: 10,751.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.01 : 18,987.45 = 7,790.69 : x
  2. Step 2: Convert to fraction form
    13,759.01/18,987.45 = 7,790.69/x
  3. Step 3: Cross multiply
    13,759.01x = 18,987.45 × 7,790.69
  4. Step 4: Simplify right side
    13,759.01x = 147,925,283.89
  5. Step 5: Solve for x
    x = 147,925,283.89/13,759.01
  6. Step 6: Final answer
    x = 10,751.16

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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.