Home / 21,981.78-30,337.20-14,434.20

Finding the Fourth Proportional to 21,981.78, 30,337.20 and 14,434.20

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Solution

The fourth proportional to 21,981.78, 30,337.20 and 14,434.20 is: 19,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.78 : 30,337.20 = 14,434.20 : x
  2. Step 2: Convert to fraction form
    21,981.78/30,337.20 = 14,434.20/x
  3. Step 3: Cross multiply
    21,981.78x = 30,337.20 × 14,434.20
  4. Step 4: Simplify right side
    21,981.78x = 437,893,212.24
  5. Step 5: Solve for x
    x = 437,893,212.24/21,981.78
  6. Step 6: Final answer
    x = 19,920.73

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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.