Home / 21,018.90-31,518.02-6,974.16

Finding the Fourth Proportional to 21,018.90, 31,518.02 and 6,974.16

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Solution

The fourth proportional to 21,018.90, 31,518.02 and 6,974.16 is: 10,457.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.90 : 31,518.02 = 6,974.16 : x
  2. Step 2: Convert to fraction form
    21,018.90/31,518.02 = 6,974.16/x
  3. Step 3: Cross multiply
    21,018.90x = 31,518.02 × 6,974.16
  4. Step 4: Simplify right side
    21,018.90x = 219,811,587.45
  5. Step 5: Solve for x
    x = 219,811,587.45/21,018.90
  6. Step 6: Final answer
    x = 10,457.81

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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.