Home / 31,066.20-42,871.56-16,918.68

Finding the Fourth Proportional to 31,066.20, 42,871.56 and 16,918.68

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Solution

The fourth proportional to 31,066.20, 42,871.56 and 16,918.68 is: 23,347.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,066.20 : 42,871.56 = 16,918.68 : x
  2. Step 2: Convert to fraction form
    31,066.20/42,871.56 = 16,918.68/x
  3. Step 3: Cross multiply
    31,066.20x = 42,871.56 × 16,918.68
  4. Step 4: Simplify right side
    31,066.20x = 725,330,204.74
  5. Step 5: Solve for x
    x = 725,330,204.74/31,066.20
  6. Step 6: Final answer
    x = 23,347.89

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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.