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Finding the Fourth Proportional to 12,421.16, 18,601.02 and 7,211.24

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Solution

The fourth proportional to 12,421.16, 18,601.02 and 7,211.24 is: 10,799.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.16 : 18,601.02 = 7,211.24 : x
  2. Step 2: Convert to fraction form
    12,421.16/18,601.02 = 7,211.24/x
  3. Step 3: Cross multiply
    12,421.16x = 18,601.02 × 7,211.24
  4. Step 4: Simplify right side
    12,421.16x = 134,136,419.46
  5. Step 5: Solve for x
    x = 134,136,419.46/12,421.16
  6. Step 6: Final answer
    x = 10,799.03

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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.