Home / 10,515.10-15,774.23-3,118.69

Finding the Fourth Proportional to 10,515.10, 15,774.23 and 3,118.69

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Solution

The fourth proportional to 10,515.10, 15,774.23 and 3,118.69 is: 4,678.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.10 : 15,774.23 = 3,118.69 : x
  2. Step 2: Convert to fraction form
    10,515.10/15,774.23 = 3,118.69/x
  3. Step 3: Cross multiply
    10,515.10x = 15,774.23 × 3,118.69
  4. Step 4: Simplify right side
    10,515.10x = 49,194,933.36
  5. Step 5: Solve for x
    x = 49,194,933.36/10,515.10
  6. Step 6: Final answer
    x = 4,678.50

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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.