Home / 13,666.45-18,856.38-7,698.11

Finding the Fourth Proportional to 13,666.45, 18,856.38 and 7,698.11

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Solution

The fourth proportional to 13,666.45, 18,856.38 and 7,698.11 is: 10,621.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,666.45 : 18,856.38 = 7,698.11 : x
  2. Step 2: Convert to fraction form
    13,666.45/18,856.38 = 7,698.11/x
  3. Step 3: Cross multiply
    13,666.45x = 18,856.38 × 7,698.11
  4. Step 4: Simplify right side
    13,666.45x = 145,158,534.58
  5. Step 5: Solve for x
    x = 145,158,534.58/13,666.45
  6. Step 6: Final answer
    x = 10,621.53

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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.