Home / 13,485.20-18,607.32-7,515.56

Finding the Fourth Proportional to 13,485.20, 18,607.32 and 7,515.56

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Solution

The fourth proportional to 13,485.20, 18,607.32 and 7,515.56 is: 10,370.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.20 : 18,607.32 = 7,515.56 : x
  2. Step 2: Convert to fraction form
    13,485.20/18,607.32 = 7,515.56/x
  3. Step 3: Cross multiply
    13,485.20x = 18,607.32 × 7,515.56
  4. Step 4: Simplify right side
    13,485.20x = 139,844,429.90
  5. Step 5: Solve for x
    x = 139,844,429.90/13,485.20
  6. Step 6: Final answer
    x = 10,370.22

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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.