Home / 21,281.22-31,925.64-7,240.54

Finding the Fourth Proportional to 21,281.22, 31,925.64 and 7,240.54

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Solution

The fourth proportional to 21,281.22, 31,925.64 and 7,240.54 is: 10,862.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.22 : 31,925.64 = 7,240.54 : x
  2. Step 2: Convert to fraction form
    21,281.22/31,925.64 = 7,240.54/x
  3. Step 3: Cross multiply
    21,281.22x = 31,925.64 × 7,240.54
  4. Step 4: Simplify right side
    21,281.22x = 231,158,873.45
  5. Step 5: Solve for x
    x = 231,158,873.45/21,281.22
  6. Step 6: Final answer
    x = 10,862.11

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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.