Home / 20,343.28-30,391.62-12,888.08

Finding the Fourth Proportional to 20,343.28, 30,391.62 and 12,888.08

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Solution

The fourth proportional to 20,343.28, 30,391.62 and 12,888.08 is: 19,254.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.28 : 30,391.62 = 12,888.08 : x
  2. Step 2: Convert to fraction form
    20,343.28/30,391.62 = 12,888.08/x
  3. Step 3: Cross multiply
    20,343.28x = 30,391.62 × 12,888.08
  4. Step 4: Simplify right side
    20,343.28x = 391,689,629.89
  5. Step 5: Solve for x
    x = 391,689,629.89/20,343.28
  6. Step 6: Final answer
    x = 19,254.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.