Home / 20,724.03-28,583.40-13,457.79

Finding the Fourth Proportional to 20,724.03, 28,583.40 and 13,457.79

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Solution

The fourth proportional to 20,724.03, 28,583.40 and 13,457.79 is: 18,561.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.03 : 28,583.40 = 13,457.79 : x
  2. Step 2: Convert to fraction form
    20,724.03/28,583.40 = 13,457.79/x
  3. Step 3: Cross multiply
    20,724.03x = 28,583.40 × 13,457.79
  4. Step 4: Simplify right side
    20,724.03x = 384,669,394.69
  5. Step 5: Solve for x
    x = 384,669,394.69/20,724.03
  6. Step 6: Final answer
    x = 18,561.52

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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.