Home / 30,877.13-42,611.18-18,933.54

Finding the Fourth Proportional to 30,877.13, 42,611.18 and 18,933.54

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Solution

The fourth proportional to 30,877.13, 42,611.18 and 18,933.54 is: 26,128.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,877.13 : 42,611.18 = 18,933.54 : x
  2. Step 2: Convert to fraction form
    30,877.13/42,611.18 = 18,933.54/x
  3. Step 3: Cross multiply
    30,877.13x = 42,611.18 × 18,933.54
  4. Step 4: Simplify right side
    30,877.13x = 806,780,386.31
  5. Step 5: Solve for x
    x = 806,780,386.31/30,877.13
  6. Step 6: Final answer
    x = 26,128.74

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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.