Home / 30,877.89-42,611.37-16,730.78

Finding the Fourth Proportional to 30,877.89, 42,611.37 and 16,730.78

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Solution

The fourth proportional to 30,877.89, 42,611.37 and 16,730.78 is: 23,088.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,877.89 : 42,611.37 = 16,730.78 : x
  2. Step 2: Convert to fraction form
    30,877.89/42,611.37 = 16,730.78/x
  3. Step 3: Cross multiply
    30,877.89x = 42,611.37 × 16,730.78
  4. Step 4: Simplify right side
    30,877.89x = 712,921,243.91
  5. Step 5: Solve for x
    x = 712,921,243.91/30,877.89
  6. Step 6: Final answer
    x = 23,088.41

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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.