Home / 21,206.16-31,771.08-11,835

Finding the Fourth Proportional to 21,206.16, 31,771.08 and 11,835

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Solution

The fourth proportional to 21,206.16, 31,771.08 and 11,835 is: 17,731.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,206.16 : 31,771.08 = 11,835 : x
  2. Step 2: Convert to fraction form
    21,206.16/31,771.08 = 11,835/x
  3. Step 3: Cross multiply
    21,206.16x = 31,771.08 × 11,835
  4. Step 4: Simplify right side
    21,206.16x = 376,010,731.80
  5. Step 5: Solve for x
    x = 376,010,731.80/21,206.16
  6. Step 6: Final answer
    x = 17,731.20

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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.