Home / 8,428.85-12,637.20-5,508.80

Finding the Fourth Proportional to 8,428.85, 12,637.20 and 5,508.80

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Solution

The fourth proportional to 8,428.85, 12,637.20 and 5,508.80 is: 8,259.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.85 : 12,637.20 = 5,508.80 : x
  2. Step 2: Convert to fraction form
    8,428.85/12,637.20 = 5,508.80/x
  3. Step 3: Cross multiply
    8,428.85x = 12,637.20 × 5,508.80
  4. Step 4: Simplify right side
    8,428.85x = 69,615,807.36
  5. Step 5: Solve for x
    x = 69,615,807.36/8,428.85
  6. Step 6: Final answer
    x = 8,259.23

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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.