Home / 31,282.10-43,153.21-21,207.12

Finding the Fourth Proportional to 31,282.10, 43,153.21 and 21,207.12

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Solution

The fourth proportional to 31,282.10, 43,153.21 and 21,207.12 is: 29,254.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,282.10 : 43,153.21 = 21,207.12 : x
  2. Step 2: Convert to fraction form
    31,282.10/43,153.21 = 21,207.12/x
  3. Step 3: Cross multiply
    31,282.10x = 43,153.21 × 21,207.12
  4. Step 4: Simplify right side
    31,282.10x = 915,155,048.25
  5. Step 5: Solve for x
    x = 915,155,048.25/31,282.10
  6. Step 6: Final answer
    x = 29,254.91

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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.