Home / 30,514.77-42,115.38-20,946.76

Finding the Fourth Proportional to 30,514.77, 42,115.38 and 20,946.76

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Solution

The fourth proportional to 30,514.77, 42,115.38 and 20,946.76 is: 28,909.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,514.77 : 42,115.38 = 20,946.76 : x
  2. Step 2: Convert to fraction form
    30,514.77/42,115.38 = 20,946.76/x
  3. Step 3: Cross multiply
    30,514.77x = 42,115.38 × 20,946.76
  4. Step 4: Simplify right side
    30,514.77x = 882,180,757.17
  5. Step 5: Solve for x
    x = 882,180,757.17/30,514.77
  6. Step 6: Final answer
    x = 28,909.96

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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.