Home / 30,613.42-42,248.41-20,386.92

Finding the Fourth Proportional to 30,613.42, 42,248.41 and 20,386.92

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Solution

The fourth proportional to 30,613.42, 42,248.41 and 20,386.92 is: 28,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,613.42 : 42,248.41 = 20,386.92 : x
  2. Step 2: Convert to fraction form
    30,613.42/42,248.41 = 20,386.92/x
  3. Step 3: Cross multiply
    30,613.42x = 42,248.41 × 20,386.92
  4. Step 4: Simplify right side
    30,613.42x = 861,314,692.59
  5. Step 5: Solve for x
    x = 861,314,692.59/30,613.42
  6. Step 6: Final answer
    x = 28,135.20

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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.