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Finding the Fourth Proportional to 15,978.72, 22,044.12 and 10,603.68

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Solution

The fourth proportional to 15,978.72, 22,044.12 and 10,603.68 is: 14,628.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.72 : 22,044.12 = 10,603.68 : x
  2. Step 2: Convert to fraction form
    15,978.72/22,044.12 = 10,603.68/x
  3. Step 3: Cross multiply
    15,978.72x = 22,044.12 × 10,603.68
  4. Step 4: Simplify right side
    15,978.72x = 233,748,794.36
  5. Step 5: Solve for x
    x = 233,748,794.36/15,978.72
  6. Step 6: Final answer
    x = 14,628.76

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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.