Home / 13,128.70-18,118.08-7,464.40

Finding the Fourth Proportional to 13,128.70, 18,118.08 and 7,464.40

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Solution

The fourth proportional to 13,128.70, 18,118.08 and 7,464.40 is: 10,301.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.70 : 18,118.08 = 7,464.40 : x
  2. Step 2: Convert to fraction form
    13,128.70/18,118.08 = 7,464.40/x
  3. Step 3: Cross multiply
    13,128.70x = 18,118.08 × 7,464.40
  4. Step 4: Simplify right side
    13,128.70x = 135,240,505.76
  5. Step 5: Solve for x
    x = 135,240,505.76/13,128.70
  6. Step 6: Final answer
    x = 10,301.14

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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.