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Finding the Fourth Proportional to 20,587.92, 30,881.88 and 5,005.50

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Solution

The fourth proportional to 20,587.92, 30,881.88 and 5,005.50 is: 7,508.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.92 : 30,881.88 = 5,005.50 : x
  2. Step 2: Convert to fraction form
    20,587.92/30,881.88 = 5,005.50/x
  3. Step 3: Cross multiply
    20,587.92x = 30,881.88 × 5,005.50
  4. Step 4: Simplify right side
    20,587.92x = 154,579,250.34
  5. Step 5: Solve for x
    x = 154,579,250.34/20,587.92
  6. Step 6: Final answer
    x = 7,508.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.