Home / 15,135.10-20,880.79-9,467.70

Finding the Fourth Proportional to 15,135.10, 20,880.79 and 9,467.70

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Solution

The fourth proportional to 15,135.10, 20,880.79 and 9,467.70 is: 13,061.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.10 : 20,880.79 = 9,467.70 : x
  2. Step 2: Convert to fraction form
    15,135.10/20,880.79 = 9,467.70/x
  3. Step 3: Cross multiply
    15,135.10x = 20,880.79 × 9,467.70
  4. Step 4: Simplify right side
    15,135.10x = 197,693,055.48
  5. Step 5: Solve for x
    x = 197,693,055.48/15,135.10
  6. Step 6: Final answer
    x = 13,061.89

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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.