Home / 31,106.12-42,926.64-16,959.20

Finding the Fourth Proportional to 31,106.12, 42,926.64 and 16,959.20

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Solution

The fourth proportional to 31,106.12, 42,926.64 and 16,959.20 is: 23,403.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,106.12 : 42,926.64 = 16,959.20 : x
  2. Step 2: Convert to fraction form
    31,106.12/42,926.64 = 16,959.20/x
  3. Step 3: Cross multiply
    31,106.12x = 42,926.64 × 16,959.20
  4. Step 4: Simplify right side
    31,106.12x = 728,001,473.09
  5. Step 5: Solve for x
    x = 728,001,473.09/31,106.12
  6. Step 6: Final answer
    x = 23,403.80

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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.