Home / 18,678.84-25,771.68-13,007.28

Finding the Fourth Proportional to 18,678.84, 25,771.68 and 13,007.28

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Solution

The fourth proportional to 18,678.84, 25,771.68 and 13,007.28 is: 17,946.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.84 : 25,771.68 = 13,007.28 : x
  2. Step 2: Convert to fraction form
    18,678.84/25,771.68 = 13,007.28/x
  3. Step 3: Cross multiply
    18,678.84x = 25,771.68 × 13,007.28
  4. Step 4: Simplify right side
    18,678.84x = 335,219,457.83
  5. Step 5: Solve for x
    x = 335,219,457.83/18,678.84
  6. Step 6: Final answer
    x = 17,946.48

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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.