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Finding the Fourth Proportional to 12,956.34, 17,880.65 and 7,291.63

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Solution

The fourth proportional to 12,956.34, 17,880.65 and 7,291.63 is: 10,062.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,956.34 : 17,880.65 = 7,291.63 : x
  2. Step 2: Convert to fraction form
    12,956.34/17,880.65 = 7,291.63/x
  3. Step 3: Cross multiply
    12,956.34x = 17,880.65 × 7,291.63
  4. Step 4: Simplify right side
    12,956.34x = 130,379,138.21
  5. Step 5: Solve for x
    x = 130,379,138.21/12,956.34
  6. Step 6: Final answer
    x = 10,062.96

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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.