Home / 13,390.86-18,478.83-7,340.97

Finding the Fourth Proportional to 13,390.86, 18,478.83 and 7,340.97

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Solution

The fourth proportional to 13,390.86, 18,478.83 and 7,340.97 is: 10,130.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.86 : 18,478.83 = 7,340.97 : x
  2. Step 2: Convert to fraction form
    13,390.86/18,478.83 = 7,340.97/x
  3. Step 3: Cross multiply
    13,390.86x = 18,478.83 × 7,340.97
  4. Step 4: Simplify right side
    13,390.86x = 135,652,536.67
  5. Step 5: Solve for x
    x = 135,652,536.67/13,390.86
  6. Step 6: Final answer
    x = 10,130.23

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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.