Home / 28,535.28-39,377.79-15,787.69

Finding the Fourth Proportional to 28,535.28, 39,377.79 and 15,787.69

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Solution

The fourth proportional to 28,535.28, 39,377.79 and 15,787.69 is: 21,786.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.28 : 39,377.79 = 15,787.69 : x
  2. Step 2: Convert to fraction form
    28,535.28/39,377.79 = 15,787.69/x
  3. Step 3: Cross multiply
    28,535.28x = 39,377.79 × 15,787.69
  4. Step 4: Simplify right side
    28,535.28x = 621,684,341.41
  5. Step 5: Solve for x
    x = 621,684,341.41/28,535.28
  6. Step 6: Final answer
    x = 21,786.52

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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.