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Finding the Fourth Proportional to 35,136, 48,488.40 and 20,996.88

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Solution

The fourth proportional to 35,136, 48,488.40 and 20,996.88 is: 28,976.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,136 : 48,488.40 = 20,996.88 : x
  2. Step 2: Convert to fraction form
    35,136/48,488.40 = 20,996.88/x
  3. Step 3: Cross multiply
    35,136x = 48,488.40 × 20,996.88
  4. Step 4: Simplify right side
    35,136x = 1,018,105,116.19
  5. Step 5: Solve for x
    x = 1,018,105,116.19/35,136
  6. Step 6: Final answer
    x = 28,976.12

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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.