Home / 22,990.11-31,725.64-12,918.30

Finding the Fourth Proportional to 22,990.11, 31,725.64 and 12,918.30

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Solution

The fourth proportional to 22,990.11, 31,725.64 and 12,918.30 is: 17,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,990.11 : 31,725.64 = 12,918.30 : x
  2. Step 2: Convert to fraction form
    22,990.11/31,725.64 = 12,918.30/x
  3. Step 3: Cross multiply
    22,990.11x = 31,725.64 × 12,918.30
  4. Step 4: Simplify right side
    22,990.11x = 409,841,111.99
  5. Step 5: Solve for x
    x = 409,841,111.99/22,990.11
  6. Step 6: Final answer
    x = 17,826.85

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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.