Home / 21,210.83-31,816.32-7,170.96

Finding the Fourth Proportional to 21,210.83, 31,816.32 and 7,170.96

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Solution

The fourth proportional to 21,210.83, 31,816.32 and 7,170.96 is: 10,756.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.83 : 31,816.32 = 7,170.96 : x
  2. Step 2: Convert to fraction form
    21,210.83/31,816.32 = 7,170.96/x
  3. Step 3: Cross multiply
    21,210.83x = 31,816.32 × 7,170.96
  4. Step 4: Simplify right side
    21,210.83x = 228,153,558.07
  5. Step 5: Solve for x
    x = 228,153,558.07/21,210.83
  6. Step 6: Final answer
    x = 10,756.47

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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.