Home / 13,553.72-20,341.53-6,981.78

Finding the Fourth Proportional to 13,553.72, 20,341.53 and 6,981.78

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Solution

The fourth proportional to 13,553.72, 20,341.53 and 6,981.78 is: 10,478.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,553.72 : 20,341.53 = 6,981.78 : x
  2. Step 2: Convert to fraction form
    13,553.72/20,341.53 = 6,981.78/x
  3. Step 3: Cross multiply
    13,553.72x = 20,341.53 × 6,981.78
  4. Step 4: Simplify right side
    13,553.72x = 142,020,087.32
  5. Step 5: Solve for x
    x = 142,020,087.32/13,553.72
  6. Step 6: Final answer
    x = 10,478.31

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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.