Home / 20,410.65-28,169.78-12,457.49

Finding the Fourth Proportional to 20,410.65, 28,169.78 and 12,457.49

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Solution

The fourth proportional to 20,410.65, 28,169.78 and 12,457.49 is: 17,193.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.65 : 28,169.78 = 12,457.49 : x
  2. Step 2: Convert to fraction form
    20,410.65/28,169.78 = 12,457.49/x
  3. Step 3: Cross multiply
    20,410.65x = 28,169.78 × 12,457.49
  4. Step 4: Simplify right side
    20,410.65x = 350,924,549.52
  5. Step 5: Solve for x
    x = 350,924,549.52/20,410.65
  6. Step 6: Final answer
    x = 17,193.21

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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.