Home / 20,762.90-28,644.08-14,478.92

Finding the Fourth Proportional to 20,762.90, 28,644.08 and 14,478.92

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Solution

The fourth proportional to 20,762.90, 28,644.08 and 14,478.92 is: 19,974.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.90 : 28,644.08 = 14,478.92 : x
  2. Step 2: Convert to fraction form
    20,762.90/28,644.08 = 14,478.92/x
  3. Step 3: Cross multiply
    20,762.90x = 28,644.08 × 14,478.92
  4. Step 4: Simplify right side
    20,762.90x = 414,735,342.79
  5. Step 5: Solve for x
    x = 414,735,342.79/20,762.90
  6. Step 6: Final answer
    x = 19,974.83

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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.