Home / 8,490.40-12,731.27-4,987.25

Finding the Fourth Proportional to 8,490.40, 12,731.27 and 4,987.25

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Solution

The fourth proportional to 8,490.40, 12,731.27 and 4,987.25 is: 7,478.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.40 : 12,731.27 = 4,987.25 : x
  2. Step 2: Convert to fraction form
    8,490.40/12,731.27 = 4,987.25/x
  3. Step 3: Cross multiply
    8,490.40x = 12,731.27 × 4,987.25
  4. Step 4: Simplify right side
    8,490.40x = 63,493,986.45
  5. Step 5: Solve for x
    x = 63,493,986.45/8,490.40
  6. Step 6: Final answer
    x = 7,478.33

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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.