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Finding the Fourth Proportional to 12,801.53, 17,665.54 and 7,136.90

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Solution

The fourth proportional to 12,801.53, 17,665.54 and 7,136.90 is: 9,848.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,801.53 : 17,665.54 = 7,136.90 : x
  2. Step 2: Convert to fraction form
    12,801.53/17,665.54 = 7,136.90/x
  3. Step 3: Cross multiply
    12,801.53x = 17,665.54 × 7,136.90
  4. Step 4: Simplify right side
    12,801.53x = 126,077,192.43
  5. Step 5: Solve for x
    x = 126,077,192.43/12,801.53
  6. Step 6: Final answer
    x = 9,848.60

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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.