Home / 20,412.12-28,166.81-11,457.89

Finding the Fourth Proportional to 20,412.12, 28,166.81 and 11,457.89

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Solution

The fourth proportional to 20,412.12, 28,166.81 and 11,457.89 is: 15,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.12 : 28,166.81 = 11,457.89 : x
  2. Step 2: Convert to fraction form
    20,412.12/28,166.81 = 11,457.89/x
  3. Step 3: Cross multiply
    20,412.12x = 28,166.81 × 11,457.89
  4. Step 4: Simplify right side
    20,412.12x = 322,732,012.51
  5. Step 5: Solve for x
    x = 322,732,012.51/20,412.12
  6. Step 6: Final answer
    x = 15,810.80

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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.