Home / 13,731.12-18,938.88-9,013.68

Finding the Fourth Proportional to 13,731.12, 18,938.88 and 9,013.68

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Solution

The fourth proportional to 13,731.12, 18,938.88 and 9,013.68 is: 12,432.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.12 : 18,938.88 = 9,013.68 : x
  2. Step 2: Convert to fraction form
    13,731.12/18,938.88 = 9,013.68/x
  3. Step 3: Cross multiply
    13,731.12x = 18,938.88 × 9,013.68
  4. Step 4: Simplify right side
    13,731.12x = 170,709,003.88
  5. Step 5: Solve for x
    x = 170,709,003.88/13,731.12
  6. Step 6: Final answer
    x = 12,432.27

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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.