Home / 4,985.28-6,880.32-3,124.80

Finding the Fourth Proportional to 4,985.28, 6,880.32 and 3,124.80

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Solution

The fourth proportional to 4,985.28, 6,880.32 and 3,124.80 is: 4,312.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.28 : 6,880.32 = 3,124.80 : x
  2. Step 2: Convert to fraction form
    4,985.28/6,880.32 = 3,124.80/x
  3. Step 3: Cross multiply
    4,985.28x = 6,880.32 × 3,124.80
  4. Step 4: Simplify right side
    4,985.28x = 21,499,623.94
  5. Step 5: Solve for x
    x = 21,499,623.94/4,985.28
  6. Step 6: Final answer
    x = 4,312.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.