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Finding the Fourth Proportional to 12,555, 17,325.90 and 9,574.20

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Solution

The fourth proportional to 12,555, 17,325.90 and 9,574.20 is: 13,212.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555 : 17,325.90 = 9,574.20 : x
  2. Step 2: Convert to fraction form
    12,555/17,325.90 = 9,574.20/x
  3. Step 3: Cross multiply
    12,555x = 17,325.90 × 9,574.20
  4. Step 4: Simplify right side
    12,555x = 165,881,631.78
  5. Step 5: Solve for x
    x = 165,881,631.78/12,555
  6. Step 6: Final answer
    x = 13,212.40

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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.