Home / 13,155.86-18,155.07-7,490.31

Finding the Fourth Proportional to 13,155.86, 18,155.07 and 7,490.31

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Solution

The fourth proportional to 13,155.86, 18,155.07 and 7,490.31 is: 10,336.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.86 : 18,155.07 = 7,490.31 : x
  2. Step 2: Convert to fraction form
    13,155.86/18,155.07 = 7,490.31/x
  3. Step 3: Cross multiply
    13,155.86x = 18,155.07 × 7,490.31
  4. Step 4: Simplify right side
    13,155.86x = 135,987,102.37
  5. Step 5: Solve for x
    x = 135,987,102.37/13,155.86
  6. Step 6: Final answer
    x = 10,336.62

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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.