Home / 15,921.64-21,971.20-8,848.72

Finding the Fourth Proportional to 15,921.64, 21,971.20 and 8,848.72

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Solution

The fourth proportional to 15,921.64, 21,971.20 and 8,848.72 is: 12,210.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.64 : 21,971.20 = 8,848.72 : x
  2. Step 2: Convert to fraction form
    15,921.64/21,971.20 = 8,848.72/x
  3. Step 3: Cross multiply
    15,921.64x = 21,971.20 × 8,848.72
  4. Step 4: Simplify right side
    15,921.64x = 194,416,996.86
  5. Step 5: Solve for x
    x = 194,416,996.86/15,921.64
  6. Step 6: Final answer
    x = 12,210.87

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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.