Home / 15,140.56-20,890.78-8,851.72

Finding the Fourth Proportional to 15,140.56, 20,890.78 and 8,851.72

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Solution

The fourth proportional to 15,140.56, 20,890.78 and 8,851.72 is: 12,213.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.56 : 20,890.78 = 8,851.72 : x
  2. Step 2: Convert to fraction form
    15,140.56/20,890.78 = 8,851.72/x
  3. Step 3: Cross multiply
    15,140.56x = 20,890.78 × 8,851.72
  4. Step 4: Simplify right side
    15,140.56x = 184,919,335.14
  5. Step 5: Solve for x
    x = 184,919,335.14/15,140.56
  6. Step 6: Final answer
    x = 12,213.51

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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.