Home / 13,215.60-18,237.66-7,551.09

Finding the Fourth Proportional to 13,215.60, 18,237.66 and 7,551.09

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Solution

The fourth proportional to 13,215.60, 18,237.66 and 7,551.09 is: 10,420.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.60 : 18,237.66 = 7,551.09 : x
  2. Step 2: Convert to fraction form
    13,215.60/18,237.66 = 7,551.09/x
  3. Step 3: Cross multiply
    13,215.60x = 18,237.66 × 7,551.09
  4. Step 4: Simplify right side
    13,215.60x = 137,714,212.05
  5. Step 5: Solve for x
    x = 137,714,212.05/13,215.60
  6. Step 6: Final answer
    x = 10,420.58

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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.