Home / 21,109.54-31,643.43-9,996.70

Finding the Fourth Proportional to 21,109.54, 31,643.43 and 9,996.70

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Solution

The fourth proportional to 21,109.54, 31,643.43 and 9,996.70 is: 14,985.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.54 : 31,643.43 = 9,996.70 : x
  2. Step 2: Convert to fraction form
    21,109.54/31,643.43 = 9,996.70/x
  3. Step 3: Cross multiply
    21,109.54x = 31,643.43 × 9,996.70
  4. Step 4: Simplify right side
    21,109.54x = 316,329,876.68
  5. Step 5: Solve for x
    x = 316,329,876.68/21,109.54
  6. Step 6: Final answer
    x = 14,985.16

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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.