Home / 20,978.46-31,426.14-13,588.08

Finding the Fourth Proportional to 20,978.46, 31,426.14 and 13,588.08

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Solution

The fourth proportional to 20,978.46, 31,426.14 and 13,588.08 is: 20,355.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,978.46 : 31,426.14 = 13,588.08 : x
  2. Step 2: Convert to fraction form
    20,978.46/31,426.14 = 13,588.08/x
  3. Step 3: Cross multiply
    20,978.46x = 31,426.14 × 13,588.08
  4. Step 4: Simplify right side
    20,978.46x = 427,020,904.41
  5. Step 5: Solve for x
    x = 427,020,904.41/20,978.46
  6. Step 6: Final answer
    x = 20,355.21

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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.