Home / 21,807.15-30,098.70-13,847.87

Finding the Fourth Proportional to 21,807.15, 30,098.70 and 13,847.87

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Solution

The fourth proportional to 21,807.15, 30,098.70 and 13,847.87 is: 19,113.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,807.15 : 30,098.70 = 13,847.87 : x
  2. Step 2: Convert to fraction form
    21,807.15/30,098.70 = 13,847.87/x
  3. Step 3: Cross multiply
    21,807.15x = 30,098.70 × 13,847.87
  4. Step 4: Simplify right side
    21,807.15x = 416,802,734.28
  5. Step 5: Solve for x
    x = 416,802,734.28/21,807.15
  6. Step 6: Final answer
    x = 19,113.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.