Home / 21,070.83-31,621.26-9,979.97

Finding the Fourth Proportional to 21,070.83, 31,621.26 and 9,979.97

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Solution

The fourth proportional to 21,070.83, 31,621.26 and 9,979.97 is: 14,977.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.83 : 31,621.26 = 9,979.97 : x
  2. Step 2: Convert to fraction form
    21,070.83/31,621.26 = 9,979.97/x
  3. Step 3: Cross multiply
    21,070.83x = 31,621.26 × 9,979.97
  4. Step 4: Simplify right side
    21,070.83x = 315,579,226.16
  5. Step 5: Solve for x
    x = 315,579,226.16/21,070.83
  6. Step 6: Final answer
    x = 14,977.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.