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Finding the Fourth Proportional to 14,479.80, 19,981.84 and 8,106.40

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Solution

The fourth proportional to 14,479.80, 19,981.84 and 8,106.40 is: 11,186.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,479.80 : 19,981.84 = 8,106.40 : x
  2. Step 2: Convert to fraction form
    14,479.80/19,981.84 = 8,106.40/x
  3. Step 3: Cross multiply
    14,479.80x = 19,981.84 × 8,106.40
  4. Step 4: Simplify right side
    14,479.80x = 161,980,767.51
  5. Step 5: Solve for x
    x = 161,980,767.51/14,479.80
  6. Step 6: Final answer
    x = 11,186.67

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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.