Home / 20,665.60-28,522.64-12,280.48

Finding the Fourth Proportional to 20,665.60, 28,522.64 and 12,280.48

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Solution

The fourth proportional to 20,665.60, 28,522.64 and 12,280.48 is: 16,949.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.60 : 28,522.64 = 12,280.48 : x
  2. Step 2: Convert to fraction form
    20,665.60/28,522.64 = 12,280.48/x
  3. Step 3: Cross multiply
    20,665.60x = 28,522.64 × 12,280.48
  4. Step 4: Simplify right side
    20,665.60x = 350,271,710.07
  5. Step 5: Solve for x
    x = 350,271,710.07/20,665.60
  6. Step 6: Final answer
    x = 16,949.51

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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.