Home / 12,513.12-18,762.80-4,188.75

Finding the Fourth Proportional to 12,513.12, 18,762.80 and 4,188.75

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Solution

The fourth proportional to 12,513.12, 18,762.80 and 4,188.75 is: 6,280.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,513.12 : 18,762.80 = 4,188.75 : x
  2. Step 2: Convert to fraction form
    12,513.12/18,762.80 = 4,188.75/x
  3. Step 3: Cross multiply
    12,513.12x = 18,762.80 × 4,188.75
  4. Step 4: Simplify right side
    12,513.12x = 78,592,657.56
  5. Step 5: Solve for x
    x = 78,592,657.56/12,513.12
  6. Step 6: Final answer
    x = 6,280.82

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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.