Home / 28,382.96-39,168.49-15,807.71

Finding the Fourth Proportional to 28,382.96, 39,168.49 and 15,807.71

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Solution

The fourth proportional to 28,382.96, 39,168.49 and 15,807.71 is: 21,814.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.96 : 39,168.49 = 15,807.71 : x
  2. Step 2: Convert to fraction form
    28,382.96/39,168.49 = 15,807.71/x
  3. Step 3: Cross multiply
    28,382.96x = 39,168.49 × 15,807.71
  4. Step 4: Simplify right side
    28,382.96x = 619,163,895.70
  5. Step 5: Solve for x
    x = 619,163,895.70/28,382.96
  6. Step 6: Final answer
    x = 21,814.64

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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.