Home / 21,512.46-29,678.90-15,860.64

Finding the Fourth Proportional to 21,512.46, 29,678.90 and 15,860.64

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Solution

The fourth proportional to 21,512.46, 29,678.90 and 15,860.64 is: 21,881.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.46 : 29,678.90 = 15,860.64 : x
  2. Step 2: Convert to fraction form
    21,512.46/29,678.90 = 15,860.64/x
  3. Step 3: Cross multiply
    21,512.46x = 29,678.90 × 15,860.64
  4. Step 4: Simplify right side
    21,512.46x = 470,726,348.50
  5. Step 5: Solve for x
    x = 470,726,348.50/21,512.46
  6. Step 6: Final answer
    x = 21,881.57

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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.