Home / 20,670.72-31,005.36-10,148.64

Finding the Fourth Proportional to 20,670.72, 31,005.36 and 10,148.64

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Solution

The fourth proportional to 20,670.72, 31,005.36 and 10,148.64 is: 15,222.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.72 : 31,005.36 = 10,148.64 : x
  2. Step 2: Convert to fraction form
    20,670.72/31,005.36 = 10,148.64/x
  3. Step 3: Cross multiply
    20,670.72x = 31,005.36 × 10,148.64
  4. Step 4: Simplify right side
    20,670.72x = 314,662,236.71
  5. Step 5: Solve for x
    x = 314,662,236.71/20,670.72
  6. Step 6: Final answer
    x = 15,222.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.