Home / 28,381.92-39,168.84-15,806.64

Finding the Fourth Proportional to 28,381.92, 39,168.84 and 15,806.64

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Solution

The fourth proportional to 28,381.92, 39,168.84 and 15,806.64 is: 21,814.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.92 : 39,168.84 = 15,806.64 : x
  2. Step 2: Convert to fraction form
    28,381.92/39,168.84 = 15,806.64/x
  3. Step 3: Cross multiply
    28,381.92x = 39,168.84 × 15,806.64
  4. Step 4: Simplify right side
    28,381.92x = 619,127,753.10
  5. Step 5: Solve for x
    x = 619,127,753.10/28,381.92
  6. Step 6: Final answer
    x = 21,814.16

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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.