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Finding the Fourth Proportional to 10,881.70, 16,322.55 and 7,123.30

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Solution

The fourth proportional to 10,881.70, 16,322.55 and 7,123.30 is: 10,684.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.70 : 16,322.55 = 7,123.30 : x
  2. Step 2: Convert to fraction form
    10,881.70/16,322.55 = 7,123.30/x
  3. Step 3: Cross multiply
    10,881.70x = 16,322.55 × 7,123.30
  4. Step 4: Simplify right side
    10,881.70x = 116,270,420.42
  5. Step 5: Solve for x
    x = 116,270,420.42/10,881.70
  6. Step 6: Final answer
    x = 10,684.95

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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.