Home / 8,875.20-13,312.80-3,939.60

Finding the Fourth Proportional to 8,875.20, 13,312.80 and 3,939.60

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Solution

The fourth proportional to 8,875.20, 13,312.80 and 3,939.60 is: 5,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,875.20 : 13,312.80 = 3,939.60 : x
  2. Step 2: Convert to fraction form
    8,875.20/13,312.80 = 3,939.60/x
  3. Step 3: Cross multiply
    8,875.20x = 13,312.80 × 3,939.60
  4. Step 4: Simplify right side
    8,875.20x = 52,447,106.88
  5. Step 5: Solve for x
    x = 52,447,106.88/8,875.20
  6. Step 6: Final answer
    x = 5,909.40

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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.