Home / 28,130.72-38,821.20-15,556.64

Finding the Fourth Proportional to 28,130.72, 38,821.20 and 15,556.64

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Solution

The fourth proportional to 28,130.72, 38,821.20 and 15,556.64 is: 21,468.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.72 : 38,821.20 = 15,556.64 : x
  2. Step 2: Convert to fraction form
    28,130.72/38,821.20 = 15,556.64/x
  3. Step 3: Cross multiply
    28,130.72x = 38,821.20 × 15,556.64
  4. Step 4: Simplify right side
    28,130.72x = 603,927,432.77
  5. Step 5: Solve for x
    x = 603,927,432.77/28,130.72
  6. Step 6: Final answer
    x = 21,468.61

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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.