Home / 21,210.46-31,815.70-5,416.67

Finding the Fourth Proportional to 21,210.46, 31,815.70 and 5,416.67

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Solution

The fourth proportional to 21,210.46, 31,815.70 and 5,416.67 is: 8,125.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.46 : 31,815.70 = 5,416.67 : x
  2. Step 2: Convert to fraction form
    21,210.46/31,815.70 = 5,416.67/x
  3. Step 3: Cross multiply
    21,210.46x = 31,815.70 × 5,416.67
  4. Step 4: Simplify right side
    21,210.46x = 172,335,213.72
  5. Step 5: Solve for x
    x = 172,335,213.72/21,210.46
  6. Step 6: Final answer
    x = 8,125.01

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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.