Home / 13,398.89-20,050.79-9,880.65

Finding the Fourth Proportional to 13,398.89, 20,050.79 and 9,880.65

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Solution

The fourth proportional to 13,398.89, 20,050.79 and 9,880.65 is: 14,785.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.89 : 20,050.79 = 9,880.65 : x
  2. Step 2: Convert to fraction form
    13,398.89/20,050.79 = 9,880.65/x
  3. Step 3: Cross multiply
    13,398.89x = 20,050.79 × 9,880.65
  4. Step 4: Simplify right side
    13,398.89x = 198,114,788.81
  5. Step 5: Solve for x
    x = 198,114,788.81/13,398.89
  6. Step 6: Final answer
    x = 14,785.92

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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.