Home / 21,247.98-31,875.78-8,761.06

Finding the Fourth Proportional to 21,247.98, 31,875.78 and 8,761.06

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Solution

The fourth proportional to 21,247.98, 31,875.78 and 8,761.06 is: 13,143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.98 : 31,875.78 = 8,761.06 : x
  2. Step 2: Convert to fraction form
    21,247.98/31,875.78 = 8,761.06/x
  3. Step 3: Cross multiply
    21,247.98x = 31,875.78 × 8,761.06
  4. Step 4: Simplify right side
    21,247.98x = 279,265,621.13
  5. Step 5: Solve for x
    x = 279,265,621.13/21,247.98
  6. Step 6: Final answer
    x = 13,143.16

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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.