Home / 21,985.92-30,343.68-13,605.12

Finding the Fourth Proportional to 21,985.92, 30,343.68 and 13,605.12

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Solution

The fourth proportional to 21,985.92, 30,343.68 and 13,605.12 is: 18,776.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.92 : 30,343.68 = 13,605.12 : x
  2. Step 2: Convert to fraction form
    21,985.92/30,343.68 = 13,605.12/x
  3. Step 3: Cross multiply
    21,985.92x = 30,343.68 × 13,605.12
  4. Step 4: Simplify right side
    21,985.92x = 412,829,407.64
  5. Step 5: Solve for x
    x = 412,829,407.64/21,985.92
  6. Step 6: Final answer
    x = 18,776.99

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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.