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Finding the Fourth Proportional to 12,756.54, 17,599.02 and 9,407.28

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Solution

The fourth proportional to 12,756.54, 17,599.02 and 9,407.28 is: 12,978.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.54 : 17,599.02 = 9,407.28 : x
  2. Step 2: Convert to fraction form
    12,756.54/17,599.02 = 9,407.28/x
  3. Step 3: Cross multiply
    12,756.54x = 17,599.02 × 9,407.28
  4. Step 4: Simplify right side
    12,756.54x = 165,558,908.87
  5. Step 5: Solve for x
    x = 165,558,908.87/12,756.54
  6. Step 6: Final answer
    x = 12,978.36

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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.