Home / 28,529.28-39,369.69-15,782.16

Finding the Fourth Proportional to 28,529.28, 39,369.69 and 15,782.16

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Solution

The fourth proportional to 28,529.28, 39,369.69 and 15,782.16 is: 21,778.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,529.28 : 39,369.69 = 15,782.16 : x
  2. Step 2: Convert to fraction form
    28,529.28/39,369.69 = 15,782.16/x
  3. Step 3: Cross multiply
    28,529.28x = 39,369.69 × 15,782.16
  4. Step 4: Simplify right side
    28,529.28x = 621,338,746.73
  5. Step 5: Solve for x
    x = 621,338,746.73/28,529.28
  6. Step 6: Final answer
    x = 21,778.98

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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.