Home / 13,353.86-18,428.51-8,320.12

Finding the Fourth Proportional to 13,353.86, 18,428.51 and 8,320.12

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Solution

The fourth proportional to 13,353.86, 18,428.51 and 8,320.12 is: 11,481.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,353.86 : 18,428.51 = 8,320.12 : x
  2. Step 2: Convert to fraction form
    13,353.86/18,428.51 = 8,320.12/x
  3. Step 3: Cross multiply
    13,353.86x = 18,428.51 × 8,320.12
  4. Step 4: Simplify right side
    13,353.86x = 153,327,389.35
  5. Step 5: Solve for x
    x = 153,327,389.35/13,353.86
  6. Step 6: Final answer
    x = 11,481.88

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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.