Home / 28,381.68-39,168.72-15,809.04

Finding the Fourth Proportional to 28,381.68, 39,168.72 and 15,809.04

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Solution

The fourth proportional to 28,381.68, 39,168.72 and 15,809.04 is: 21,817.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.68 : 39,168.72 = 15,809.04 : x
  2. Step 2: Convert to fraction form
    28,381.68/39,168.72 = 15,809.04/x
  3. Step 3: Cross multiply
    28,381.68x = 39,168.72 × 15,809.04
  4. Step 4: Simplify right side
    28,381.68x = 619,219,861.23
  5. Step 5: Solve for x
    x = 619,219,861.23/28,381.68
  6. Step 6: Final answer
    x = 21,817.59

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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.