Home / 21,875.43-30,177.84-12,916.83

Finding the Fourth Proportional to 21,875.43, 30,177.84 and 12,916.83

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Solution

The fourth proportional to 21,875.43, 30,177.84 and 12,916.83 is: 17,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.43 : 30,177.84 = 12,916.83 : x
  2. Step 2: Convert to fraction form
    21,875.43/30,177.84 = 12,916.83/x
  3. Step 3: Cross multiply
    21,875.43x = 30,177.84 × 12,916.83
  4. Step 4: Simplify right side
    21,875.43x = 389,802,029.05
  5. Step 5: Solve for x
    x = 389,802,029.05/21,875.43
  6. Step 6: Final answer
    x = 17,819.17

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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.