Home / 20,579.51-28,399.72-11,148.07

Finding the Fourth Proportional to 20,579.51, 28,399.72 and 11,148.07

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Solution

The fourth proportional to 20,579.51, 28,399.72 and 11,148.07 is: 15,384.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.51 : 28,399.72 = 11,148.07 : x
  2. Step 2: Convert to fraction form
    20,579.51/28,399.72 = 11,148.07/x
  3. Step 3: Cross multiply
    20,579.51x = 28,399.72 × 11,148.07
  4. Step 4: Simplify right side
    20,579.51x = 316,601,967.67
  5. Step 5: Solve for x
    x = 316,601,967.67/20,579.51
  6. Step 6: Final answer
    x = 15,384.33

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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.