Home / 12,790.61-17,646.36-7,751.20

Finding the Fourth Proportional to 12,790.61, 17,646.36 and 7,751.20

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Solution

The fourth proportional to 12,790.61, 17,646.36 and 7,751.20 is: 10,693.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.61 : 17,646.36 = 7,751.20 : x
  2. Step 2: Convert to fraction form
    12,790.61/17,646.36 = 7,751.20/x
  3. Step 3: Cross multiply
    12,790.61x = 17,646.36 × 7,751.20
  4. Step 4: Simplify right side
    12,790.61x = 136,780,377.40
  5. Step 5: Solve for x
    x = 136,780,377.40/12,790.61
  6. Step 6: Final answer
    x = 10,693.81

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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.