Home / 30,555.28-42,165.90-17,129.86

Finding the Fourth Proportional to 30,555.28, 42,165.90 and 17,129.86

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Solution

The fourth proportional to 30,555.28, 42,165.90 and 17,129.86 is: 23,638.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,555.28 : 42,165.90 = 17,129.86 : x
  2. Step 2: Convert to fraction form
    30,555.28/42,165.90 = 17,129.86/x
  3. Step 3: Cross multiply
    30,555.28x = 42,165.90 × 17,129.86
  4. Step 4: Simplify right side
    30,555.28x = 722,295,963.77
  5. Step 5: Solve for x
    x = 722,295,963.77/30,555.28
  6. Step 6: Final answer
    x = 23,638.99

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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.