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Finding the Fourth Proportional to 12,675.70, 18,995.06 and 7,130.59

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Solution

The fourth proportional to 12,675.70, 18,995.06 and 7,130.59 is: 10,685.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,675.70 : 18,995.06 = 7,130.59 : x
  2. Step 2: Convert to fraction form
    12,675.70/18,995.06 = 7,130.59/x
  3. Step 3: Cross multiply
    12,675.70x = 18,995.06 × 7,130.59
  4. Step 4: Simplify right side
    12,675.70x = 135,445,984.89
  5. Step 5: Solve for x
    x = 135,445,984.89/12,675.70
  6. Step 6: Final answer
    x = 10,685.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.