Home / 15,136.20-20,888.55-9,164.49

Finding the Fourth Proportional to 15,136.20, 20,888.55 and 9,164.49

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Solution

The fourth proportional to 15,136.20, 20,888.55 and 9,164.49 is: 12,647.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.20 : 20,888.55 = 9,164.49 : x
  2. Step 2: Convert to fraction form
    15,136.20/20,888.55 = 9,164.49/x
  3. Step 3: Cross multiply
    15,136.20x = 20,888.55 × 9,164.49
  4. Step 4: Simplify right side
    15,136.20x = 191,432,907.59
  5. Step 5: Solve for x
    x = 191,432,907.59/15,136.20
  6. Step 6: Final answer
    x = 12,647.36

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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.