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Finding the Fourth Proportional to 13,689.80, 20,502.30 and 9,283.40

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Solution

The fourth proportional to 13,689.80, 20,502.30 and 9,283.40 is: 13,903.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.80 : 20,502.30 = 9,283.40 : x
  2. Step 2: Convert to fraction form
    13,689.80/20,502.30 = 9,283.40/x
  3. Step 3: Cross multiply
    13,689.80x = 20,502.30 × 9,283.40
  4. Step 4: Simplify right side
    13,689.80x = 190,331,051.82
  5. Step 5: Solve for x
    x = 190,331,051.82/13,689.80
  6. Step 6: Final answer
    x = 13,903.13

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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.