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Finding the Fourth Proportional to 21,390.80, 32,082.92 and 5,804.72

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Solution

The fourth proportional to 21,390.80, 32,082.92 and 5,804.72 is: 8,706.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.80 : 32,082.92 = 5,804.72 : x
  2. Step 2: Convert to fraction form
    21,390.80/32,082.92 = 5,804.72/x
  3. Step 3: Cross multiply
    21,390.80x = 32,082.92 × 5,804.72
  4. Step 4: Simplify right side
    21,390.80x = 186,232,367.38
  5. Step 5: Solve for x
    x = 186,232,367.38/21,390.80
  6. Step 6: Final answer
    x = 8,706.19

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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.