Home / 20,932.16-28,873.58-12,428.51

Finding the Fourth Proportional to 20,932.16, 28,873.58 and 12,428.51

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Solution

The fourth proportional to 20,932.16, 28,873.58 and 12,428.51 is: 17,143.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.16 : 28,873.58 = 12,428.51 : x
  2. Step 2: Convert to fraction form
    20,932.16/28,873.58 = 12,428.51/x
  3. Step 3: Cross multiply
    20,932.16x = 28,873.58 × 12,428.51
  4. Step 4: Simplify right side
    20,932.16x = 358,855,371.26
  5. Step 5: Solve for x
    x = 358,855,371.26/20,932.16
  6. Step 6: Final answer
    x = 17,143.74

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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.