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Finding the Fourth Proportional to 35,292, 48,707.28 and 20,388

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Solution

The fourth proportional to 35,292, 48,707.28 and 20,388 is: 28,137.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,292 : 48,707.28 = 20,388 : x
  2. Step 2: Convert to fraction form
    35,292/48,707.28 = 20,388/x
  3. Step 3: Cross multiply
    35,292x = 48,707.28 × 20,388
  4. Step 4: Simplify right side
    35,292x = 993,044,024.64
  5. Step 5: Solve for x
    x = 993,044,024.64/35,292
  6. Step 6: Final answer
    x = 28,137.94

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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.