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Finding the Fourth Proportional to 35,070.92, 48,389.94 and 20,921

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Solution

The fourth proportional to 35,070.92, 48,389.94 and 20,921 is: 28,866.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,070.92 : 48,389.94 = 20,921 : x
  2. Step 2: Convert to fraction form
    35,070.92/48,389.94 = 20,921/x
  3. Step 3: Cross multiply
    35,070.92x = 48,389.94 × 20,921
  4. Step 4: Simplify right side
    35,070.92x = 1,012,365,934.74
  5. Step 5: Solve for x
    x = 1,012,365,934.74/35,070.92
  6. Step 6: Final answer
    x = 28,866.25

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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.