Home / 15,330.81-21,156.95-8,617.05

Finding the Fourth Proportional to 15,330.81, 21,156.95 and 8,617.05

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Solution

The fourth proportional to 15,330.81, 21,156.95 and 8,617.05 is: 11,891.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.81 : 21,156.95 = 8,617.05 : x
  2. Step 2: Convert to fraction form
    15,330.81/21,156.95 = 8,617.05/x
  3. Step 3: Cross multiply
    15,330.81x = 21,156.95 × 8,617.05
  4. Step 4: Simplify right side
    15,330.81x = 182,310,452.91
  5. Step 5: Solve for x
    x = 182,310,452.91/15,330.81
  6. Step 6: Final answer
    x = 11,891.77

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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.