Home / 30,877.50-42,615.81-18,299.82

Finding the Fourth Proportional to 30,877.50, 42,615.81 and 18,299.82

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Solution

The fourth proportional to 30,877.50, 42,615.81 and 18,299.82 is: 25,256.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,877.50 : 42,615.81 = 18,299.82 : x
  2. Step 2: Convert to fraction form
    30,877.50/42,615.81 = 18,299.82/x
  3. Step 3: Cross multiply
    30,877.50x = 42,615.81 × 18,299.82
  4. Step 4: Simplify right side
    30,877.50x = 779,861,652.15
  5. Step 5: Solve for x
    x = 779,861,652.15/30,877.50
  6. Step 6: Final answer
    x = 25,256.63

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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.