Home / 21,110.04-31,644.18-9,997.20

Finding the Fourth Proportional to 21,110.04, 31,644.18 and 9,997.20

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Solution

The fourth proportional to 21,110.04, 31,644.18 and 9,997.20 is: 14,985.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.04 : 31,644.18 = 9,997.20 : x
  2. Step 2: Convert to fraction form
    21,110.04/31,644.18 = 9,997.20/x
  3. Step 3: Cross multiply
    21,110.04x = 31,644.18 × 9,997.20
  4. Step 4: Simplify right side
    21,110.04x = 316,353,196.30
  5. Step 5: Solve for x
    x = 316,353,196.30/21,110.04
  6. Step 6: Final answer
    x = 14,985.91

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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.