Home / 15,691.10-21,653.87-8,617.67

Finding the Fourth Proportional to 15,691.10, 21,653.87 and 8,617.67

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Solution

The fourth proportional to 15,691.10, 21,653.87 and 8,617.67 is: 11,892.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.10 : 21,653.87 = 8,617.67 : x
  2. Step 2: Convert to fraction form
    15,691.10/21,653.87 = 8,617.67/x
  3. Step 3: Cross multiply
    15,691.10x = 21,653.87 × 8,617.67
  4. Step 4: Simplify right side
    15,691.10x = 186,605,862.79
  5. Step 5: Solve for x
    x = 186,605,862.79/15,691.10
  6. Step 6: Final answer
    x = 11,892.47

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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.