Home / 21,678.75-32,530.28-21,513.51

Finding the Fourth Proportional to 21,678.75, 32,530.28 and 21,513.51

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Solution

The fourth proportional to 21,678.75, 32,530.28 and 21,513.51 is: 32,282.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.75 : 32,530.28 = 21,513.51 : x
  2. Step 2: Convert to fraction form
    21,678.75/32,530.28 = 21,513.51/x
  3. Step 3: Cross multiply
    21,678.75x = 32,530.28 × 21,513.51
  4. Step 4: Simplify right side
    21,678.75x = 699,840,396.52
  5. Step 5: Solve for x
    x = 699,840,396.52/21,678.75
  6. Step 6: Final answer
    x = 32,282.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.