Home / 13,518.84-18,650.86-9,990.52

Finding the Fourth Proportional to 13,518.84, 18,650.86 and 9,990.52

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Solution

The fourth proportional to 13,518.84, 18,650.86 and 9,990.52 is: 13,783.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.84 : 18,650.86 = 9,990.52 : x
  2. Step 2: Convert to fraction form
    13,518.84/18,650.86 = 9,990.52/x
  3. Step 3: Cross multiply
    13,518.84x = 18,650.86 × 9,990.52
  4. Step 4: Simplify right side
    13,518.84x = 186,331,789.85
  5. Step 5: Solve for x
    x = 186,331,789.85/13,518.84
  6. Step 6: Final answer
    x = 13,783.12

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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.