Home / 21,150.68-31,728.14-7,827.18

Finding the Fourth Proportional to 21,150.68, 31,728.14 and 7,827.18

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Solution

The fourth proportional to 21,150.68, 31,728.14 and 7,827.18 is: 11,741.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.68 : 31,728.14 = 7,827.18 : x
  2. Step 2: Convert to fraction form
    21,150.68/31,728.14 = 7,827.18/x
  3. Step 3: Cross multiply
    21,150.68x = 31,728.14 × 7,827.18
  4. Step 4: Simplify right side
    21,150.68x = 248,341,823.71
  5. Step 5: Solve for x
    x = 248,341,823.71/21,150.68
  6. Step 6: Final answer
    x = 11,741.56

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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.