Home / 20,640.30-28,483.04-11,688.64

Finding the Fourth Proportional to 20,640.30, 28,483.04 and 11,688.64

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Solution

The fourth proportional to 20,640.30, 28,483.04 and 11,688.64 is: 16,130.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.30 : 28,483.04 = 11,688.64 : x
  2. Step 2: Convert to fraction form
    20,640.30/28,483.04 = 11,688.64/x
  3. Step 3: Cross multiply
    20,640.30x = 28,483.04 × 11,688.64
  4. Step 4: Simplify right side
    20,640.30x = 332,928,000.67
  5. Step 5: Solve for x
    x = 332,928,000.67/20,640.30
  6. Step 6: Final answer
    x = 16,130.00

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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.