Home / 13,149.43-19,630.43-12,688.03

Finding the Fourth Proportional to 13,149.43, 19,630.43 and 12,688.03

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Solution

The fourth proportional to 13,149.43, 19,630.43 and 12,688.03 is: 18,941.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.43 : 19,630.43 = 12,688.03 : x
  2. Step 2: Convert to fraction form
    13,149.43/19,630.43 = 12,688.03/x
  3. Step 3: Cross multiply
    13,149.43x = 19,630.43 × 12,688.03
  4. Step 4: Simplify right side
    13,149.43x = 249,071,484.75
  5. Step 5: Solve for x
    x = 249,071,484.75/13,149.43
  6. Step 6: Final answer
    x = 18,941.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.