Home / 30,713.19-42,367.64-20,521.77

Finding the Fourth Proportional to 30,713.19, 42,367.64 and 20,521.77

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Solution

The fourth proportional to 30,713.19, 42,367.64 and 20,521.77 is: 28,308.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,713.19 : 42,367.64 = 20,521.77 : x
  2. Step 2: Convert to fraction form
    30,713.19/42,367.64 = 20,521.77/x
  3. Step 3: Cross multiply
    30,713.19x = 42,367.64 × 20,521.77
  4. Step 4: Simplify right side
    30,713.19x = 869,458,860.91
  5. Step 5: Solve for x
    x = 869,458,860.91/30,713.19
  6. Step 6: Final answer
    x = 28,308.97

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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.