Home / 8,421.30-12,615.78-4,712.28

Finding the Fourth Proportional to 8,421.30, 12,615.78 and 4,712.28

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Solution

The fourth proportional to 8,421.30, 12,615.78 and 4,712.28 is: 7,059.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.30 : 12,615.78 = 4,712.28 : x
  2. Step 2: Convert to fraction form
    8,421.30/12,615.78 = 4,712.28/x
  3. Step 3: Cross multiply
    8,421.30x = 12,615.78 × 4,712.28
  4. Step 4: Simplify right side
    8,421.30x = 59,449,087.78
  5. Step 5: Solve for x
    x = 59,449,087.78/8,421.30
  6. Step 6: Final answer
    x = 7,059.37

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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.