Home / 21,585.49-29,782.79-12,154.05

Finding the Fourth Proportional to 21,585.49, 29,782.79 and 12,154.05

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Solution

The fourth proportional to 21,585.49, 29,782.79 and 12,154.05 is: 16,769.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,585.49 : 29,782.79 = 12,154.05 : x
  2. Step 2: Convert to fraction form
    21,585.49/29,782.79 = 12,154.05/x
  3. Step 3: Cross multiply
    21,585.49x = 29,782.79 × 12,154.05
  4. Step 4: Simplify right side
    21,585.49x = 361,981,503.61
  5. Step 5: Solve for x
    x = 361,981,503.61/21,585.49
  6. Step 6: Final answer
    x = 16,769.67

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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.