Home / 15,315.21-21,132.72-8,599.86

Finding the Fourth Proportional to 15,315.21, 21,132.72 and 8,599.86

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Solution

The fourth proportional to 15,315.21, 21,132.72 and 8,599.86 is: 11,866.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.21 : 21,132.72 = 8,599.86 : x
  2. Step 2: Convert to fraction form
    15,315.21/21,132.72 = 8,599.86/x
  3. Step 3: Cross multiply
    15,315.21x = 21,132.72 × 8,599.86
  4. Step 4: Simplify right side
    15,315.21x = 181,738,433.42
  5. Step 5: Solve for x
    x = 181,738,433.42/15,315.21
  6. Step 6: Final answer
    x = 11,866.53

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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.