Home / 18,921.15-28,381.68-10,492.81

Finding the Fourth Proportional to 18,921.15, 28,381.68 and 10,492.81

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Solution

The fourth proportional to 18,921.15, 28,381.68 and 10,492.81 is: 15,739.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.15 : 28,381.68 = 10,492.81 : x
  2. Step 2: Convert to fraction form
    18,921.15/28,381.68 = 10,492.81/x
  3. Step 3: Cross multiply
    18,921.15x = 28,381.68 × 10,492.81
  4. Step 4: Simplify right side
    18,921.15x = 297,803,504.77
  5. Step 5: Solve for x
    x = 297,803,504.77/18,921.15
  6. Step 6: Final answer
    x = 15,739.19

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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.