Home / 20,488.84-30,727.63-12,981.13

Finding the Fourth Proportional to 20,488.84, 30,727.63 and 12,981.13

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Solution

The fourth proportional to 20,488.84, 30,727.63 and 12,981.13 is: 19,468.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.84 : 30,727.63 = 12,981.13 : x
  2. Step 2: Convert to fraction form
    20,488.84/30,727.63 = 12,981.13/x
  3. Step 3: Cross multiply
    20,488.84x = 30,727.63 × 12,981.13
  4. Step 4: Simplify right side
    20,488.84x = 398,879,299.03
  5. Step 5: Solve for x
    x = 398,879,299.03/20,488.84
  6. Step 6: Final answer
    x = 19,468.13

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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.