Home / 28,382.45-39,167.79-15,807.20

Finding the Fourth Proportional to 28,382.45, 39,167.79 and 15,807.20

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Solution

The fourth proportional to 28,382.45, 39,167.79 and 15,807.20 is: 21,813.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.45 : 39,167.79 = 15,807.20 : x
  2. Step 2: Convert to fraction form
    28,382.45/39,167.79 = 15,807.20/x
  3. Step 3: Cross multiply
    28,382.45x = 39,167.79 × 15,807.20
  4. Step 4: Simplify right side
    28,382.45x = 619,133,148.49
  5. Step 5: Solve for x
    x = 619,133,148.49/28,382.45
  6. Step 6: Final answer
    x = 21,813.94

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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.