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Finding the Fourth Proportional to 8,475.40, 12,713.10 and 7,090.30

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Solution

The fourth proportional to 8,475.40, 12,713.10 and 7,090.30 is: 10,635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,475.40 : 12,713.10 = 7,090.30 : x
  2. Step 2: Convert to fraction form
    8,475.40/12,713.10 = 7,090.30/x
  3. Step 3: Cross multiply
    8,475.40x = 12,713.10 × 7,090.30
  4. Step 4: Simplify right side
    8,475.40x = 90,139,692.93
  5. Step 5: Solve for x
    x = 90,139,692.93/8,475.40
  6. Step 6: Final answer
    x = 10,635.45

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Similar ratio
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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.