Home / 21,197.16-31,861.35-13,455.18

Finding the Fourth Proportional to 21,197.16, 31,861.35 and 13,455.18

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Solution

The fourth proportional to 21,197.16, 31,861.35 and 13,455.18 is: 20,224.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197.16 : 31,861.35 = 13,455.18 : x
  2. Step 2: Convert to fraction form
    21,197.16/31,861.35 = 13,455.18/x
  3. Step 3: Cross multiply
    21,197.16x = 31,861.35 × 13,455.18
  4. Step 4: Simplify right side
    21,197.16x = 428,700,199.29
  5. Step 5: Solve for x
    x = 428,700,199.29/21,197.16
  6. Step 6: Final answer
    x = 20,224.42

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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.