Home / 13,215.85-18,238.01-7,551.34

Finding the Fourth Proportional to 13,215.85, 18,238.01 and 7,551.34

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Solution

The fourth proportional to 13,215.85, 18,238.01 and 7,551.34 is: 10,420.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.85 : 18,238.01 = 7,551.34 : x
  2. Step 2: Convert to fraction form
    13,215.85/18,238.01 = 7,551.34/x
  3. Step 3: Cross multiply
    13,215.85x = 18,238.01 × 7,551.34
  4. Step 4: Simplify right side
    13,215.85x = 137,721,285.49
  5. Step 5: Solve for x
    x = 137,721,285.49/13,215.85
  6. Step 6: Final answer
    x = 10,420.92

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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.