Home / 10,991.10-16,486.65-5,148.30

Finding the Fourth Proportional to 10,991.10, 16,486.65 and 5,148.30

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Solution

The fourth proportional to 10,991.10, 16,486.65 and 5,148.30 is: 7,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.10 : 16,486.65 = 5,148.30 : x
  2. Step 2: Convert to fraction form
    10,991.10/16,486.65 = 5,148.30/x
  3. Step 3: Cross multiply
    10,991.10x = 16,486.65 × 5,148.30
  4. Step 4: Simplify right side
    10,991.10x = 84,878,220.20
  5. Step 5: Solve for x
    x = 84,878,220.20/10,991.10
  6. Step 6: Final answer
    x = 7,722.45

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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.