Home / 15,879.68-21,901.32-10,215.08

Finding the Fourth Proportional to 15,879.68, 21,901.32 and 10,215.08

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Solution

The fourth proportional to 15,879.68, 21,901.32 and 10,215.08 is: 14,088.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.68 : 21,901.32 = 10,215.08 : x
  2. Step 2: Convert to fraction form
    15,879.68/21,901.32 = 10,215.08/x
  3. Step 3: Cross multiply
    15,879.68x = 21,901.32 × 10,215.08
  4. Step 4: Simplify right side
    15,879.68x = 223,723,735.91
  5. Step 5: Solve for x
    x = 223,723,735.91/15,879.68
  6. Step 6: Final answer
    x = 14,088.68

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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.