Home / 28,631.94-39,510.09-15,884.61

Finding the Fourth Proportional to 28,631.94, 39,510.09 and 15,884.61

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Solution

The fourth proportional to 28,631.94, 39,510.09 and 15,884.61 is: 21,919.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.94 : 39,510.09 = 15,884.61 : x
  2. Step 2: Convert to fraction form
    28,631.94/39,510.09 = 15,884.61/x
  3. Step 3: Cross multiply
    28,631.94x = 39,510.09 × 15,884.61
  4. Step 4: Simplify right side
    28,631.94x = 627,602,370.71
  5. Step 5: Solve for x
    x = 627,602,370.71/28,631.94
  6. Step 6: Final answer
    x = 21,919.66

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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.