Home / 21,063.54-31,434.10-18,817.16

Finding the Fourth Proportional to 21,063.54, 31,434.10 and 18,817.16

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Solution

The fourth proportional to 21,063.54, 31,434.10 and 18,817.16 is: 28,081.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.54 : 31,434.10 = 18,817.16 : x
  2. Step 2: Convert to fraction form
    21,063.54/31,434.10 = 18,817.16/x
  3. Step 3: Cross multiply
    21,063.54x = 31,434.10 × 18,817.16
  4. Step 4: Simplify right side
    21,063.54x = 591,500,489.16
  5. Step 5: Solve for x
    x = 591,500,489.16/21,063.54
  6. Step 6: Final answer
    x = 28,081.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.