Home / 21,097.80-29,115.18-11,666.70

Finding the Fourth Proportional to 21,097.80, 29,115.18 and 11,666.70

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Solution

The fourth proportional to 21,097.80, 29,115.18 and 11,666.70 is: 16,100.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,097.80 : 29,115.18 = 11,666.70 : x
  2. Step 2: Convert to fraction form
    21,097.80/29,115.18 = 11,666.70/x
  3. Step 3: Cross multiply
    21,097.80x = 29,115.18 × 11,666.70
  4. Step 4: Simplify right side
    21,097.80x = 339,678,070.51
  5. Step 5: Solve for x
    x = 339,678,070.51/21,097.80
  6. Step 6: Final answer
    x = 16,100.17

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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.