Home / 28,284.70-39,034.65-15,709.42

Finding the Fourth Proportional to 28,284.70, 39,034.65 and 15,709.42

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Solution

The fourth proportional to 28,284.70, 39,034.65 and 15,709.42 is: 21,679.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,284.70 : 39,034.65 = 15,709.42 : x
  2. Step 2: Convert to fraction form
    28,284.70/39,034.65 = 15,709.42/x
  3. Step 3: Cross multiply
    28,284.70x = 39,034.65 × 15,709.42
  4. Step 4: Simplify right side
    28,284.70x = 613,211,711.40
  5. Step 5: Solve for x
    x = 613,211,711.40/28,284.70
  6. Step 6: Final answer
    x = 21,679.98

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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.