Home / 13,389.17-18,476.33-7,420.48

Finding the Fourth Proportional to 13,389.17, 18,476.33 and 7,420.48

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Solution

The fourth proportional to 13,389.17, 18,476.33 and 7,420.48 is: 10,239.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.17 : 18,476.33 = 7,420.48 : x
  2. Step 2: Convert to fraction form
    13,389.17/18,476.33 = 7,420.48/x
  3. Step 3: Cross multiply
    13,389.17x = 18,476.33 × 7,420.48
  4. Step 4: Simplify right side
    13,389.17x = 137,103,153.95
  5. Step 5: Solve for x
    x = 137,103,153.95/13,389.17
  6. Step 6: Final answer
    x = 10,239.86

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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.