Home / 8,420.52-12,638.56-4,263.45

Finding the Fourth Proportional to 8,420.52, 12,638.56 and 4,263.45

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Solution

The fourth proportional to 8,420.52, 12,638.56 and 4,263.45 is: 6,399.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.52 : 12,638.56 = 4,263.45 : x
  2. Step 2: Convert to fraction form
    8,420.52/12,638.56 = 4,263.45/x
  3. Step 3: Cross multiply
    8,420.52x = 12,638.56 × 4,263.45
  4. Step 4: Simplify right side
    8,420.52x = 53,883,868.63
  5. Step 5: Solve for x
    x = 53,883,868.63/8,420.52
  6. Step 6: Final answer
    x = 6,399.11

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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.