Home / 20,663.91-28,529.92-15,875.32

Finding the Fourth Proportional to 20,663.91, 28,529.92 and 15,875.32

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Solution

The fourth proportional to 20,663.91, 28,529.92 and 15,875.32 is: 21,918.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.91 : 28,529.92 = 15,875.32 : x
  2. Step 2: Convert to fraction form
    20,663.91/28,529.92 = 15,875.32/x
  3. Step 3: Cross multiply
    20,663.91x = 28,529.92 × 15,875.32
  4. Step 4: Simplify right side
    20,663.91x = 452,921,609.57
  5. Step 5: Solve for x
    x = 452,921,609.57/20,663.91
  6. Step 6: Final answer
    x = 21,918.49

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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.