Home / 13,127.90-18,113.29-8,418.56

Finding the Fourth Proportional to 13,127.90, 18,113.29 and 8,418.56

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Solution

The fourth proportional to 13,127.90, 18,113.29 and 8,418.56 is: 11,615.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.90 : 18,113.29 = 8,418.56 : x
  2. Step 2: Convert to fraction form
    13,127.90/18,113.29 = 8,418.56/x
  3. Step 3: Cross multiply
    13,127.90x = 18,113.29 × 8,418.56
  4. Step 4: Simplify right side
    13,127.90x = 152,487,707.05
  5. Step 5: Solve for x
    x = 152,487,707.05/13,127.90
  6. Step 6: Final answer
    x = 11,615.55

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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.