Home / 21,207.40-31,814.70-6,416.20

Finding the Fourth Proportional to 21,207.40, 31,814.70 and 6,416.20

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Solution

The fourth proportional to 21,207.40, 31,814.70 and 6,416.20 is: 9,625.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.40 : 31,814.70 = 6,416.20 : x
  2. Step 2: Convert to fraction form
    21,207.40/31,814.70 = 6,416.20/x
  3. Step 3: Cross multiply
    21,207.40x = 31,814.70 × 6,416.20
  4. Step 4: Simplify right side
    21,207.40x = 204,129,478.14
  5. Step 5: Solve for x
    x = 204,129,478.14/21,207.40
  6. Step 6: Final answer
    x = 9,625.39

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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.