Home / 20,457.80-28,222.52-12,898.88

Finding the Fourth Proportional to 20,457.80, 28,222.52 and 12,898.88

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Solution

The fourth proportional to 20,457.80, 28,222.52 and 12,898.88 is: 17,794.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.80 : 28,222.52 = 12,898.88 : x
  2. Step 2: Convert to fraction form
    20,457.80/28,222.52 = 12,898.88/x
  3. Step 3: Cross multiply
    20,457.80x = 28,222.52 × 12,898.88
  4. Step 4: Simplify right side
    20,457.80x = 364,038,898.78
  5. Step 5: Solve for x
    x = 364,038,898.78/20,457.80
  6. Step 6: Final answer
    x = 17,794.63

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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.