Home / 28,131.68-38,820.48-15,556.16

Finding the Fourth Proportional to 28,131.68, 38,820.48 and 15,556.16

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Solution

The fourth proportional to 28,131.68, 38,820.48 and 15,556.16 is: 21,466.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.68 : 38,820.48 = 15,556.16 : x
  2. Step 2: Convert to fraction form
    28,131.68/38,820.48 = 15,556.16/x
  3. Step 3: Cross multiply
    28,131.68x = 38,820.48 × 15,556.16
  4. Step 4: Simplify right side
    28,131.68x = 603,897,598.16
  5. Step 5: Solve for x
    x = 603,897,598.16/28,131.68
  6. Step 6: Final answer
    x = 21,466.82

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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.