Home / 12,790.40-17,645.70-9,441.20

Finding the Fourth Proportional to 12,790.40, 17,645.70 and 9,441.20

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Solution

The fourth proportional to 12,790.40, 17,645.70 and 9,441.20 is: 13,025.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.40 : 17,645.70 = 9,441.20 : x
  2. Step 2: Convert to fraction form
    12,790.40/17,645.70 = 9,441.20/x
  3. Step 3: Cross multiply
    12,790.40x = 17,645.70 × 9,441.20
  4. Step 4: Simplify right side
    12,790.40x = 166,596,582.84
  5. Step 5: Solve for x
    x = 166,596,582.84/12,790.40
  6. Step 6: Final answer
    x = 13,025.13

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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.