Home / 21,913.46-30,238.89-12,960.26

Finding the Fourth Proportional to 21,913.46, 30,238.89 and 12,960.26

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Solution

The fourth proportional to 21,913.46, 30,238.89 and 12,960.26 is: 17,884.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.46 : 30,238.89 = 12,960.26 : x
  2. Step 2: Convert to fraction form
    21,913.46/30,238.89 = 12,960.26/x
  3. Step 3: Cross multiply
    21,913.46x = 30,238.89 × 12,960.26
  4. Step 4: Simplify right side
    21,913.46x = 391,903,876.51
  5. Step 5: Solve for x
    x = 391,903,876.51/21,913.46
  6. Step 6: Final answer
    x = 17,884.16

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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.