Home / 13,389.12-18,476.73-7,420.77

Finding the Fourth Proportional to 13,389.12, 18,476.73 and 7,420.77

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Solution

The fourth proportional to 13,389.12, 18,476.73 and 7,420.77 is: 10,240.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.12 : 18,476.73 = 7,420.77 : x
  2. Step 2: Convert to fraction form
    13,389.12/18,476.73 = 7,420.77/x
  3. Step 3: Cross multiply
    13,389.12x = 18,476.73 × 7,420.77
  4. Step 4: Simplify right side
    13,389.12x = 137,111,563.68
  5. Step 5: Solve for x
    x = 137,111,563.68/13,389.12
  6. Step 6: Final answer
    x = 10,240.52

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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.