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Finding the Fourth Proportional to 9,345.78, 12,897.12 and 5,366.91

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Solution

The fourth proportional to 9,345.78, 12,897.12 and 5,366.91 is: 7,406.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,345.78 : 12,897.12 = 5,366.91 : x
  2. Step 2: Convert to fraction form
    9,345.78/12,897.12 = 5,366.91/x
  3. Step 3: Cross multiply
    9,345.78x = 12,897.12 × 5,366.91
  4. Step 4: Simplify right side
    9,345.78x = 69,217,682.30
  5. Step 5: Solve for x
    x = 69,217,682.30/9,345.78
  6. Step 6: Final answer
    x = 7,406.30

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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.