Home / 20,038.15-30,053.13-12,657.03

Finding the Fourth Proportional to 20,038.15, 30,053.13 and 12,657.03

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Solution

The fourth proportional to 20,038.15, 30,053.13 and 12,657.03 is: 18,982.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,038.15 : 30,053.13 = 12,657.03 : x
  2. Step 2: Convert to fraction form
    20,038.15/30,053.13 = 12,657.03/x
  3. Step 3: Cross multiply
    20,038.15x = 30,053.13 × 12,657.03
  4. Step 4: Simplify right side
    20,038.15x = 380,383,368.00
  5. Step 5: Solve for x
    x = 380,383,368.00/20,038.15
  6. Step 6: Final answer
    x = 18,982.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.