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Finding the Fourth Proportional to 14,989.84, 20,689.60 and 9,020.40

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Solution

The fourth proportional to 14,989.84, 20,689.60 and 9,020.40 is: 12,450.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.84 : 20,689.60 = 9,020.40 : x
  2. Step 2: Convert to fraction form
    14,989.84/20,689.60 = 9,020.40/x
  3. Step 3: Cross multiply
    14,989.84x = 20,689.60 × 9,020.40
  4. Step 4: Simplify right side
    14,989.84x = 186,628,467.84
  5. Step 5: Solve for x
    x = 186,628,467.84/14,989.84
  6. Step 6: Final answer
    x = 12,450.33

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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.