Home / 12,428.24-18,625.80-10,864.40

Finding the Fourth Proportional to 12,428.24, 18,625.80 and 10,864.40

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Solution

The fourth proportional to 12,428.24, 18,625.80 and 10,864.40 is: 16,282.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.24 : 18,625.80 = 10,864.40 : x
  2. Step 2: Convert to fraction form
    12,428.24/18,625.80 = 10,864.40/x
  3. Step 3: Cross multiply
    12,428.24x = 18,625.80 × 10,864.40
  4. Step 4: Simplify right side
    12,428.24x = 202,358,141.52
  5. Step 5: Solve for x
    x = 202,358,141.52/12,428.24
  6. Step 6: Final answer
    x = 16,282.12

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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.