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Finding the Fourth Proportional to 14,988.96, 20,686.08 and 9,020.64

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Solution

The fourth proportional to 14,988.96, 20,686.08 and 9,020.64 is: 12,449.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,988.96 : 20,686.08 = 9,020.64 : x
  2. Step 2: Convert to fraction form
    14,988.96/20,686.08 = 9,020.64/x
  3. Step 3: Cross multiply
    14,988.96x = 20,686.08 × 9,020.64
  4. Step 4: Simplify right side
    14,988.96x = 186,601,680.69
  5. Step 5: Solve for x
    x = 186,601,680.69/14,988.96
  6. Step 6: Final answer
    x = 12,449.27

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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.