Home / 20,562.47-28,380.70-13,018.86

Finding the Fourth Proportional to 20,562.47, 28,380.70 and 13,018.86

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Solution

The fourth proportional to 20,562.47, 28,380.70 and 13,018.86 is: 17,968.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.47 : 28,380.70 = 13,018.86 : x
  2. Step 2: Convert to fraction form
    20,562.47/28,380.70 = 13,018.86/x
  3. Step 3: Cross multiply
    20,562.47x = 28,380.70 × 13,018.86
  4. Step 4: Simplify right side
    20,562.47x = 369,484,360.00
  5. Step 5: Solve for x
    x = 369,484,360.00/20,562.47
  6. Step 6: Final answer
    x = 17,968.87

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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.