Home / 21,033.70-31,562.70-7,887.40

Finding the Fourth Proportional to 21,033.70, 31,562.70 and 7,887.40

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Solution

The fourth proportional to 21,033.70, 31,562.70 and 7,887.40 is: 11,835.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,033.70 : 31,562.70 = 7,887.40 : x
  2. Step 2: Convert to fraction form
    21,033.70/31,562.70 = 7,887.40/x
  3. Step 3: Cross multiply
    21,033.70x = 31,562.70 × 7,887.40
  4. Step 4: Simplify right side
    21,033.70x = 248,947,639.98
  5. Step 5: Solve for x
    x = 248,947,639.98/21,033.70
  6. Step 6: Final answer
    x = 11,835.66

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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.