Home / 21,215.06-31,822.67-7,175.20

Finding the Fourth Proportional to 21,215.06, 31,822.67 and 7,175.20

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Solution

The fourth proportional to 21,215.06, 31,822.67 and 7,175.20 is: 10,762.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.06 : 31,822.67 = 7,175.20 : x
  2. Step 2: Convert to fraction form
    21,215.06/31,822.67 = 7,175.20/x
  3. Step 3: Cross multiply
    21,215.06x = 31,822.67 × 7,175.20
  4. Step 4: Simplify right side
    21,215.06x = 228,333,985.91
  5. Step 5: Solve for x
    x = 228,333,985.91/21,215.06
  6. Step 6: Final answer
    x = 10,762.83

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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.