Home / 21,029.90-31,543.61-7,881.17

Finding the Fourth Proportional to 21,029.90, 31,543.61 and 7,881.17

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Solution

The fourth proportional to 21,029.90, 31,543.61 and 7,881.17 is: 11,821.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.90 : 31,543.61 = 7,881.17 : x
  2. Step 2: Convert to fraction form
    21,029.90/31,543.61 = 7,881.17/x
  3. Step 3: Cross multiply
    21,029.90x = 31,543.61 × 7,881.17
  4. Step 4: Simplify right side
    21,029.90x = 248,600,355.70
  5. Step 5: Solve for x
    x = 248,600,355.70/21,029.90
  6. Step 6: Final answer
    x = 11,821.28

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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.