Home / 30,587.91-42,226.15-20,512.68

Finding the Fourth Proportional to 30,587.91, 42,226.15 and 20,512.68

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Solution

The fourth proportional to 30,587.91, 42,226.15 and 20,512.68 is: 28,317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,587.91 : 42,226.15 = 20,512.68 : x
  2. Step 2: Convert to fraction form
    30,587.91/42,226.15 = 20,512.68/x
  3. Step 3: Cross multiply
    30,587.91x = 42,226.15 × 20,512.68
  4. Step 4: Simplify right side
    30,587.91x = 866,171,502.58
  5. Step 5: Solve for x
    x = 866,171,502.58/30,587.91
  6. Step 6: Final answer
    x = 28,317.45

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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.