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Finding the Fourth Proportional to 12,955.44, 17,877.88 and 7,928.04

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Solution

The fourth proportional to 12,955.44, 17,877.88 and 7,928.04 is: 10,940.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.44 : 17,877.88 = 7,928.04 : x
  2. Step 2: Convert to fraction form
    12,955.44/17,877.88 = 7,928.04/x
  3. Step 3: Cross multiply
    12,955.44x = 17,877.88 × 7,928.04
  4. Step 4: Simplify right side
    12,955.44x = 141,736,547.76
  5. Step 5: Solve for x
    x = 141,736,547.76/12,955.44
  6. Step 6: Final answer
    x = 10,940.31

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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.