Home / 20,915.82-28,863.47-11,484.32

Finding the Fourth Proportional to 20,915.82, 28,863.47 and 11,484.32

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Solution

The fourth proportional to 20,915.82, 28,863.47 and 11,484.32 is: 15,848.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.82 : 28,863.47 = 11,484.32 : x
  2. Step 2: Convert to fraction form
    20,915.82/28,863.47 = 11,484.32/x
  3. Step 3: Cross multiply
    20,915.82x = 28,863.47 × 11,484.32
  4. Step 4: Simplify right side
    20,915.82x = 331,477,325.79
  5. Step 5: Solve for x
    x = 331,477,325.79/20,915.82
  6. Step 6: Final answer
    x = 15,848.16

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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.