Home / 21,240.96-31,866.48-7,200.72

Finding the Fourth Proportional to 21,240.96, 31,866.48 and 7,200.72

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Solution

The fourth proportional to 21,240.96, 31,866.48 and 7,200.72 is: 10,802.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.96 : 31,866.48 = 7,200.72 : x
  2. Step 2: Convert to fraction form
    21,240.96/31,866.48 = 7,200.72/x
  3. Step 3: Cross multiply
    21,240.96x = 31,866.48 × 7,200.72
  4. Step 4: Simplify right side
    21,240.96x = 229,461,599.87
  5. Step 5: Solve for x
    x = 229,461,599.87/21,240.96
  6. Step 6: Final answer
    x = 10,802.79

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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.