Home / 15,531.79-21,433.90-8,458.67

Finding the Fourth Proportional to 15,531.79, 21,433.90 and 8,458.67

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Solution

The fourth proportional to 15,531.79, 21,433.90 and 8,458.67 is: 11,672.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.79 : 21,433.90 = 8,458.67 : x
  2. Step 2: Convert to fraction form
    15,531.79/21,433.90 = 8,458.67/x
  3. Step 3: Cross multiply
    15,531.79x = 21,433.90 × 8,458.67
  4. Step 4: Simplify right side
    15,531.79x = 181,302,286.91
  5. Step 5: Solve for x
    x = 181,302,286.91/15,531.79
  6. Step 6: Final answer
    x = 11,672.98

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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.