Home / 21,511.46-29,677.52-15,859.64

Finding the Fourth Proportional to 21,511.46, 29,677.52 and 15,859.64

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Solution

The fourth proportional to 21,511.46, 29,677.52 and 15,859.64 is: 21,880.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.46 : 29,677.52 = 15,859.64 : x
  2. Step 2: Convert to fraction form
    21,511.46/29,677.52 = 15,859.64/x
  3. Step 3: Cross multiply
    21,511.46x = 29,677.52 × 15,859.64
  4. Step 4: Simplify right side
    21,511.46x = 470,674,897.14
  5. Step 5: Solve for x
    x = 470,674,897.14/21,511.46
  6. Step 6: Final answer
    x = 21,880.19

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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.