Home / 21,037.92-31,579.62-18,712.81

Finding the Fourth Proportional to 21,037.92, 31,579.62 and 18,712.81

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Solution

The fourth proportional to 21,037.92, 31,579.62 and 18,712.81 is: 28,089.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,037.92 : 31,579.62 = 18,712.81 : x
  2. Step 2: Convert to fraction form
    21,037.92/31,579.62 = 18,712.81/x
  3. Step 3: Cross multiply
    21,037.92x = 31,579.62 × 18,712.81
  4. Step 4: Simplify right side
    21,037.92x = 590,943,428.93
  5. Step 5: Solve for x
    x = 590,943,428.93/21,037.92
  6. Step 6: Final answer
    x = 28,089.45

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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.