Home / 13,130.67-18,121.40-7,467.20

Finding the Fourth Proportional to 13,130.67, 18,121.40 and 7,467.20

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Solution

The fourth proportional to 13,130.67, 18,121.40 and 7,467.20 is: 10,305.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.67 : 18,121.40 = 7,467.20 : x
  2. Step 2: Convert to fraction form
    13,130.67/18,121.40 = 7,467.20/x
  3. Step 3: Cross multiply
    13,130.67x = 18,121.40 × 7,467.20
  4. Step 4: Simplify right side
    13,130.67x = 135,316,118.08
  5. Step 5: Solve for x
    x = 135,316,118.08/13,130.67
  6. Step 6: Final answer
    x = 10,305.35

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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.