Home / 28,535.23-39,377.63-15,788.21

Finding the Fourth Proportional to 28,535.23, 39,377.63 and 15,788.21

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Solution

The fourth proportional to 28,535.23, 39,377.63 and 15,788.21 is: 21,787.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.23 : 39,377.63 = 15,788.21 : x
  2. Step 2: Convert to fraction form
    28,535.23/39,377.63 = 15,788.21/x
  3. Step 3: Cross multiply
    28,535.23x = 39,377.63 × 15,788.21
  4. Step 4: Simplify right side
    28,535.23x = 621,702,212.80
  5. Step 5: Solve for x
    x = 621,702,212.80/28,535.23
  6. Step 6: Final answer
    x = 21,787.18

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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.