Home / 21,145.72-31,718.88-10,053.54

Finding the Fourth Proportional to 21,145.72, 31,718.88 and 10,053.54

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Solution

The fourth proportional to 21,145.72, 31,718.88 and 10,053.54 is: 15,080.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.72 : 31,718.88 = 10,053.54 : x
  2. Step 2: Convert to fraction form
    21,145.72/31,718.88 = 10,053.54/x
  3. Step 3: Cross multiply
    21,145.72x = 31,718.88 × 10,053.54
  4. Step 4: Simplify right side
    21,145.72x = 318,887,028.84
  5. Step 5: Solve for x
    x = 318,887,028.84/21,145.72
  6. Step 6: Final answer
    x = 15,080.45

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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.