Home / 13,389.24-18,476.85-7,420.98

Finding the Fourth Proportional to 13,389.24, 18,476.85 and 7,420.98

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Solution

The fourth proportional to 13,389.24, 18,476.85 and 7,420.98 is: 10,240.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.24 : 18,476.85 = 7,420.98 : x
  2. Step 2: Convert to fraction form
    13,389.24/18,476.85 = 7,420.98/x
  3. Step 3: Cross multiply
    13,389.24x = 18,476.85 × 7,420.98
  4. Step 4: Simplify right side
    13,389.24x = 137,116,334.31
  5. Step 5: Solve for x
    x = 137,116,334.31/13,389.24
  6. Step 6: Final answer
    x = 10,240.79

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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.