Home / 31,179.16-43,011.18-21,108.04

Finding the Fourth Proportional to 31,179.16, 43,011.18 and 21,108.04

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Solution

The fourth proportional to 31,179.16, 43,011.18 and 21,108.04 is: 29,118.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,179.16 : 43,011.18 = 21,108.04 : x
  2. Step 2: Convert to fraction form
    31,179.16/43,011.18 = 21,108.04/x
  3. Step 3: Cross multiply
    31,179.16x = 43,011.18 × 21,108.04
  4. Step 4: Simplify right side
    31,179.16x = 907,881,707.89
  5. Step 5: Solve for x
    x = 907,881,707.89/31,179.16
  6. Step 6: Final answer
    x = 29,118.22

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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.