Home / 10,987.30-16,476.90-5,438.80

Finding the Fourth Proportional to 10,987.30, 16,476.90 and 5,438.80

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Solution

The fourth proportional to 10,987.30, 16,476.90 and 5,438.80 is: 8,156.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.30 : 16,476.90 = 5,438.80 : x
  2. Step 2: Convert to fraction form
    10,987.30/16,476.90 = 5,438.80/x
  3. Step 3: Cross multiply
    10,987.30x = 16,476.90 × 5,438.80
  4. Step 4: Simplify right side
    10,987.30x = 89,614,563.72
  5. Step 5: Solve for x
    x = 89,614,563.72/10,987.30
  6. Step 6: Final answer
    x = 8,156.20

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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.