Home / 21,107.07-31,636.45-9,998.02

Finding the Fourth Proportional to 21,107.07, 31,636.45 and 9,998.02

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Solution

The fourth proportional to 21,107.07, 31,636.45 and 9,998.02 is: 14,985.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.07 : 31,636.45 = 9,998.02 : x
  2. Step 2: Convert to fraction form
    21,107.07/31,636.45 = 9,998.02/x
  3. Step 3: Cross multiply
    21,107.07x = 31,636.45 × 9,998.02
  4. Step 4: Simplify right side
    21,107.07x = 316,301,859.83
  5. Step 5: Solve for x
    x = 316,301,859.83/21,107.07
  6. Step 6: Final answer
    x = 14,985.59

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1.5x scale

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.