Home / 13,790.40-20,685.16-4,430.38

Finding the Fourth Proportional to 13,790.40, 20,685.16 and 4,430.38

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Solution

The fourth proportional to 13,790.40, 20,685.16 and 4,430.38 is: 6,645.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.40 : 20,685.16 = 4,430.38 : x
  2. Step 2: Convert to fraction form
    13,790.40/20,685.16 = 4,430.38/x
  3. Step 3: Cross multiply
    13,790.40x = 20,685.16 × 4,430.38
  4. Step 4: Simplify right side
    13,790.40x = 91,643,119.16
  5. Step 5: Solve for x
    x = 91,643,119.16/13,790.40
  6. Step 6: Final answer
    x = 6,645.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.