Home / 13,355.21-18,429.93-7,387.13

Finding the Fourth Proportional to 13,355.21, 18,429.93 and 7,387.13

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Solution

The fourth proportional to 13,355.21, 18,429.93 and 7,387.13 is: 10,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.21 : 18,429.93 = 7,387.13 : x
  2. Step 2: Convert to fraction form
    13,355.21/18,429.93 = 7,387.13/x
  3. Step 3: Cross multiply
    13,355.21x = 18,429.93 × 7,387.13
  4. Step 4: Simplify right side
    13,355.21x = 136,144,334.88
  5. Step 5: Solve for x
    x = 136,144,334.88/13,355.21
  6. Step 6: Final answer
    x = 10,194.10

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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.