Home / 13,430.33-18,528.12-8,391.12

Finding the Fourth Proportional to 13,430.33, 18,528.12 and 8,391.12

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Solution

The fourth proportional to 13,430.33, 18,528.12 and 8,391.12 is: 11,576.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.33 : 18,528.12 = 8,391.12 : x
  2. Step 2: Convert to fraction form
    13,430.33/18,528.12 = 8,391.12/x
  3. Step 3: Cross multiply
    13,430.33x = 18,528.12 × 8,391.12
  4. Step 4: Simplify right side
    13,430.33x = 155,471,636.34
  5. Step 5: Solve for x
    x = 155,471,636.34/13,430.33
  6. Step 6: Final answer
    x = 11,576.16

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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.