Home / 20,946.79-31,332.30-19,372.15

Finding the Fourth Proportional to 20,946.79, 31,332.30 and 19,372.15

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Solution

The fourth proportional to 20,946.79, 31,332.30 and 19,372.15 is: 28,976.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.79 : 31,332.30 = 19,372.15 : x
  2. Step 2: Convert to fraction form
    20,946.79/31,332.30 = 19,372.15/x
  3. Step 3: Cross multiply
    20,946.79x = 31,332.30 × 19,372.15
  4. Step 4: Simplify right side
    20,946.79x = 606,974,015.45
  5. Step 5: Solve for x
    x = 606,974,015.45/20,946.79
  6. Step 6: Final answer
    x = 28,976.95

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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.