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Finding the Fourth Proportional to 35,511.18, 48,990.03 and 20,400.39

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Solution

The fourth proportional to 35,511.18, 48,990.03 and 20,400.39 is: 28,143.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,511.18 : 48,990.03 = 20,400.39 : x
  2. Step 2: Convert to fraction form
    35,511.18/48,990.03 = 20,400.39/x
  3. Step 3: Cross multiply
    35,511.18x = 48,990.03 × 20,400.39
  4. Step 4: Simplify right side
    35,511.18x = 999,415,718.11
  5. Step 5: Solve for x
    x = 999,415,718.11/35,511.18
  6. Step 6: Final answer
    x = 28,143.69

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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.