Home / 20,746.61-28,629.34-12,693.65

Finding the Fourth Proportional to 20,746.61, 28,629.34 and 12,693.65

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Solution

The fourth proportional to 20,746.61, 28,629.34 and 12,693.65 is: 17,516.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.61 : 28,629.34 = 12,693.65 : x
  2. Step 2: Convert to fraction form
    20,746.61/28,629.34 = 12,693.65/x
  3. Step 3: Cross multiply
    20,746.61x = 28,629.34 × 12,693.65
  4. Step 4: Simplify right side
    20,746.61x = 363,410,821.69
  5. Step 5: Solve for x
    x = 363,410,821.69/20,746.61
  6. Step 6: Final answer
    x = 17,516.64

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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.