Home / 28,284.28-39,031.22-15,709.84

Finding the Fourth Proportional to 28,284.28, 39,031.22 and 15,709.84

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Solution

The fourth proportional to 28,284.28, 39,031.22 and 15,709.84 is: 21,678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,284.28 : 39,031.22 = 15,709.84 : x
  2. Step 2: Convert to fraction form
    28,284.28/39,031.22 = 15,709.84/x
  3. Step 3: Cross multiply
    28,284.28x = 39,031.22 × 15,709.84
  4. Step 4: Simplify right side
    28,284.28x = 613,174,162.90
  5. Step 5: Solve for x
    x = 613,174,162.90/28,284.28
  6. Step 6: Final answer
    x = 21,678.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.