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Finding the Fourth Proportional to 34,888.63, 48,129.39 and 20,731.45

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Solution

The fourth proportional to 34,888.63, 48,129.39 and 20,731.45 is: 28,599.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,888.63 : 48,129.39 = 20,731.45 : x
  2. Step 2: Convert to fraction form
    34,888.63/48,129.39 = 20,731.45/x
  3. Step 3: Cross multiply
    34,888.63x = 48,129.39 × 20,731.45
  4. Step 4: Simplify right side
    34,888.63x = 997,792,042.32
  5. Step 5: Solve for x
    x = 997,792,042.32/34,888.63
  6. Step 6: Final answer
    x = 28,599.35

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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.