Home / 31,214.16-43,001.80-21,765.84

Finding the Fourth Proportional to 31,214.16, 43,001.80 and 21,765.84

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Solution

The fourth proportional to 31,214.16, 43,001.80 and 21,765.84 is: 29,985.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,214.16 : 43,001.80 = 21,765.84 : x
  2. Step 2: Convert to fraction form
    31,214.16/43,001.80 = 21,765.84/x
  3. Step 3: Cross multiply
    31,214.16x = 43,001.80 × 21,765.84
  4. Step 4: Simplify right side
    31,214.16x = 935,970,298.51
  5. Step 5: Solve for x
    x = 935,970,298.51/31,214.16
  6. Step 6: Final answer
    x = 29,985.44

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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.