Home / 28,358.24-39,133.92-15,783.20

Finding the Fourth Proportional to 28,358.24, 39,133.92 and 15,783.20

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Solution

The fourth proportional to 28,358.24, 39,133.92 and 15,783.20 is: 21,780.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.24 : 39,133.92 = 15,783.20 : x
  2. Step 2: Convert to fraction form
    28,358.24/39,133.92 = 15,783.20/x
  3. Step 3: Cross multiply
    28,358.24x = 39,133.92 × 15,783.20
  4. Step 4: Simplify right side
    28,358.24x = 617,658,486.14
  5. Step 5: Solve for x
    x = 617,658,486.14/28,358.24
  6. Step 6: Final answer
    x = 21,780.56

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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.