Home / 20,817.60-31,240.80-14,978.40

Finding the Fourth Proportional to 20,817.60, 31,240.80 and 14,978.40

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Solution

The fourth proportional to 20,817.60, 31,240.80 and 14,978.40 is: 22,477.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.60 : 31,240.80 = 14,978.40 : x
  2. Step 2: Convert to fraction form
    20,817.60/31,240.80 = 14,978.40/x
  3. Step 3: Cross multiply
    20,817.60x = 31,240.80 × 14,978.40
  4. Step 4: Simplify right side
    20,817.60x = 467,937,198.72
  5. Step 5: Solve for x
    x = 467,937,198.72/20,817.60
  6. Step 6: Final answer
    x = 22,477.96

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1.5x scale

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.