Home / 21,920.40-30,244.32-12,488.76

Finding the Fourth Proportional to 21,920.40, 30,244.32 and 12,488.76

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Solution

The fourth proportional to 21,920.40, 30,244.32 and 12,488.76 is: 17,231.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.40 : 30,244.32 = 12,488.76 : x
  2. Step 2: Convert to fraction form
    21,920.40/30,244.32 = 12,488.76/x
  3. Step 3: Cross multiply
    21,920.40x = 30,244.32 × 12,488.76
  4. Step 4: Simplify right side
    21,920.40x = 377,714,053.84
  5. Step 5: Solve for x
    x = 377,714,053.84/21,920.40
  6. Step 6: Final answer
    x = 17,231.17

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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.