Home / 28,358.72-39,134.40-15,784.64

Finding the Fourth Proportional to 28,358.72, 39,134.40 and 15,784.64

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Solution

The fourth proportional to 28,358.72, 39,134.40 and 15,784.64 is: 21,782.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.72 : 39,134.40 = 15,784.64 : x
  2. Step 2: Convert to fraction form
    28,358.72/39,134.40 = 15,784.64/x
  3. Step 3: Cross multiply
    28,358.72x = 39,134.40 × 15,784.64
  4. Step 4: Simplify right side
    28,358.72x = 617,722,415.62
  5. Step 5: Solve for x
    x = 617,722,415.62/28,358.72
  6. Step 6: Final answer
    x = 21,782.45

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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.