Home / 21,282.24-31,925.64-8,145.72

Finding the Fourth Proportional to 21,282.24, 31,925.64 and 8,145.72

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Solution

The fourth proportional to 21,282.24, 31,925.64 and 8,145.72 is: 12,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.24 : 31,925.64 = 8,145.72 : x
  2. Step 2: Convert to fraction form
    21,282.24/31,925.64 = 8,145.72/x
  3. Step 3: Cross multiply
    21,282.24x = 31,925.64 × 8,145.72
  4. Step 4: Simplify right side
    21,282.24x = 260,057,324.26
  5. Step 5: Solve for x
    x = 260,057,324.26/21,282.24
  6. Step 6: Final answer
    x = 12,219.45

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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.