Home / 20,962.80-28,931.10-12,013.20

Finding the Fourth Proportional to 20,962.80, 28,931.10 and 12,013.20

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Solution

The fourth proportional to 20,962.80, 28,931.10 and 12,013.20 is: 16,579.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.80 : 28,931.10 = 12,013.20 : x
  2. Step 2: Convert to fraction form
    20,962.80/28,931.10 = 12,013.20/x
  3. Step 3: Cross multiply
    20,962.80x = 28,931.10 × 12,013.20
  4. Step 4: Simplify right side
    20,962.80x = 347,555,090.52
  5. Step 5: Solve for x
    x = 347,555,090.52/20,962.80
  6. Step 6: Final answer
    x = 16,579.61

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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.