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Finding the Fourth Proportional to 8,675.40, 13,013.10 and 3,128.94

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Solution

The fourth proportional to 8,675.40, 13,013.10 and 3,128.94 is: 4,693.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,675.40 : 13,013.10 = 3,128.94 : x
  2. Step 2: Convert to fraction form
    8,675.40/13,013.10 = 3,128.94/x
  3. Step 3: Cross multiply
    8,675.40x = 13,013.10 × 3,128.94
  4. Step 4: Simplify right side
    8,675.40x = 40,717,209.11
  5. Step 5: Solve for x
    x = 40,717,209.11/8,675.40
  6. Step 6: Final answer
    x = 4,693.41

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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.