Home / 12,928.89-17,848.68-8,702.16

Finding the Fourth Proportional to 12,928.89, 17,848.68 and 8,702.16

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Solution

The fourth proportional to 12,928.89, 17,848.68 and 8,702.16 is: 12,013.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.89 : 17,848.68 = 8,702.16 : x
  2. Step 2: Convert to fraction form
    12,928.89/17,848.68 = 8,702.16/x
  3. Step 3: Cross multiply
    12,928.89x = 17,848.68 × 8,702.16
  4. Step 4: Simplify right side
    12,928.89x = 155,322,069.15
  5. Step 5: Solve for x
    x = 155,322,069.15/12,928.89
  6. Step 6: Final answer
    x = 12,013.57

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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.