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Finding the Fourth Proportional to 12,955.08, 17,878.94 and 7,290.39

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Solution

The fourth proportional to 12,955.08, 17,878.94 and 7,290.39 is: 10,061.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.08 : 17,878.94 = 7,290.39 : x
  2. Step 2: Convert to fraction form
    12,955.08/17,878.94 = 7,290.39/x
  3. Step 3: Cross multiply
    12,955.08x = 17,878.94 × 7,290.39
  4. Step 4: Simplify right side
    12,955.08x = 130,344,445.39
  5. Step 5: Solve for x
    x = 130,344,445.39/12,955.08
  6. Step 6: Final answer
    x = 10,061.26

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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.